# Class Hierarchy

- `abc.ABC`
  - `twisted.internet.base.BaseConnector` - Basic implementation of `IConnector`.
    - `twisted.internet.tcp.Connector` - A `Connector` provides of `twisted.internet.interfaces.IConnector` for all POSIX-style reactors.
      - `twisted.internet.iocpreactor.tcp.Connector` - Undocumented
      - `twisted.internet.ssl.Connector` - Undocumented
    - `twisted.internet.unix.Connector` - Undocumented
  - `twisted.internet.defer._ConcurrencyPrimitive` - No class docstring; 0/1 instance variable, 2/7 methods documented
    - `twisted.internet.defer.DeferredLock` - A lock for event driven systems.
    - `twisted.internet.defer.DeferredSemaphore` - A semaphore for event driven systems.
  - `twisted.python.log._GlobalStartStopObserver` - Mix-in for global log observers that can start and stop.
    - `twisted.python.log.DefaultObserver` - Default observer.
    - `twisted.python.log.FileLogObserver` - Log observer that writes to a file-like object.
    - `twisted.python.log.PythonLoggingObserver` - Output twisted messages to Python standard library `logging` module.
- `AssertionError`
  - `twisted.internet.error.ReactorAlreadyInstalledError` - Could not install reactor because one is already installed.
  - `twisted.protocols.basic.StringTooLongError` - Raised when trying to send a string too long for a length prefixed protocol.
  - `twisted.trial.unittest.FailTest` - Raised to indicate the current test has failed to pass.
- `AttributeError`
  - `twisted.spread.pb.NoSuchMethod` - Raised if there is no such remote method
- `Awaitable[_DeferredResultT]`
  - `twisted.internet.defer.Deferred` - This is a callback which will be put off until later.
- `BaseException`
  - `twisted.internet.defer._DefGen_Return` - Undocumented
  - `twisted.python.failure.Failure` - A basic abstraction for an error that has occurred.
    - `twisted.spread.pb.CopiedFailure` - A `CopiedFailure` is a `pb.RemoteCopy` of a `failure.Failure` transferred via PB.
    - `twisted.spread.pb.CopyableFailure` - A `flavors.RemoteCopy` and `flavors.Copyable` version of `twisted.python.failure.Failure` for serialization.
- `code.InteractiveInterpreter`
  - `twisted.conch.manhole.ManholeInterpreter` - Interactive Interpreter with special output and Deferred support.
- `codecs.StreamReader`
  - `twisted.mail.imap4.StreamReader` - Undocumented
  - `twisted.mail.smtp.xtextStreamReader` - Undocumented
- `codecs.StreamWriter`
  - `twisted.mail.imap4.StreamWriter` - Undocumented
  - `twisted.mail.smtp.xtextStreamWriter` - Undocumented
- `collections.abc.Mapping`
  - `twisted.logger._format.CallMapping` - Read-only mapping that turns a `()`-suffix in key names into an invocation of the key rather than a lookup of the key.
- `collections.abc.Sequence`
  - `twisted.internet.testing.EventLoggingObserver` - No summary
- `collections.UserDict`
  - `twisted.protocols.postfix.PostfixTCPMapDictServerFactory` - An in-memory dictionary factory for PostfixTCPMapServer.
- `constantly.Flags`
  - `twisted.internet.ssl.ProtocolNegotiationSupport` - `ProtocolNegotiationSupport` defines flags which are used to indicate the level of NPN/ALPN support provided by the TLS backend.
  - `twisted.pair.tuntap.TunnelFlags` - `TunnelFlags` defines more flags which are used to configure the behavior of a tunnel device.
- `constantly.Names`
  - `twisted.internet.endpoints.StandardErrorBehavior` - Constants used in ProcessEndpoint to decide what to do with stderr.
  - `twisted.internet.ssl.TLSVersion` - TLS versions that we can negotiate with the client/server.
  - `twisted.logger.LogLevel` - Constants describing log levels.
  - `twisted.logger.PredicateResult` - Predicate results.
  - `twisted.positioning.base.Angles` - The types of angles.
  - `twisted.positioning.base.Directions` - The four cardinal directions (north, east, south, west).
- `constantly.Values`
  - `twisted.positioning.nmea.GPGGAFixQualities` - The possible fix quality indications for GPGGA sentences.
  - `twisted.positioning.nmea.GPGLLGPRMCFixQualities` - The possible fix quality indications in GPGLL and GPRMC sentences.
  - `twisted.positioning.nmea.GPGSAFixTypes` - The possible fix types of a GPGSA sentence.
  - `twisted.protocols.haproxy._v2parser.NetFamily` - Values for the 'family' field.
  - `twisted.protocols.haproxy._v2parser.NetProtocol` - Values for 'protocol' field.
- `datetime.tzinfo`
  - `twisted.python._tzhelper.FixedOffsetTimeZone` - Represents a fixed timezone offset (without daylight saving time).
- `Deferred[_DeferredListResultListT]`
  - `twisted.internet.defer.DeferredList` - `DeferredList` is a tool for collecting the results of several Deferreds.
- `Deferred[object]`
  - `twisted.persisted.crefutil._Defer` - Undocumented
- `dict`
  - `twisted.internet.ssl.DistinguishedName` - Identify and describe an entity.
  - `twisted.protocols.amp.AmpBox` - I am a packet in the AMP protocol, much like a regular bytes:bytes dictionary.
    - `twisted.protocols.amp._SwitchBox` - Implementation detail of ProtocolSwitchCommand: I am an AmpBox which sets up state for the protocol to switch.
    - `twisted.protocols.amp._TLSBox` - I am an AmpBox that, upon being sent, initiates a TLS connection.
    - `twisted.protocols.amp.QuitBox` - I am an AmpBox that, upon being sent, terminates the connection.
  - `twisted.python.usage.Options` - An option list parser class
    - `twisted.application.app.ServerOptions` - No class docstring; 0/1 property, 0/1 instance variable, 0/5 class variable, 2/5 methods documented
      - `twisted.scripts._twistd_unix.ServerOptions` - No class docstring; 0/4 class variable, 1/2 method documented
      - `twisted.scripts._twistw.ServerOptions` - No class docstring; 0/2 class variable, 1/1 method documented
    - `twisted.application.twist._options.TwistOptions` - Command line options for `twist`.
    - `twisted.conch.client.options.ConchOptions` - No class docstring; 0/2 instance variable, 0/3 class variable, 5/6 methods documented
      - `twisted.conch.scripts.cftp.ClientOptions` - Undocumented
      - `twisted.conch.scripts.conch.ClientOptions` - No class docstring; 0/7 class variable, 3/4 methods documented
    - `twisted.conch.manhole_tap.Options` - Undocumented
    - `twisted.conch.scripts.ckeygen.GeneralOptions` - Undocumented
    - `twisted.conch.scripts.tkconch.GeneralOptions` - Undocumented
    - `twisted.conch.tap.Options` - No class docstring; 0/1 instance variable, 0/4 class variable, 1/2 method documented
    - `twisted.mail.tap.Options` - An options list parser for twistd mail.
    - `twisted.names.tap.Options` - No class docstring; 0/5 instance variable, 0/3 class variable, 4/6 methods documented
    - `twisted.runner.inetdtap.Options` - To use it, create a file named `sample-inetd.conf` with:
    - `twisted.runner.procmontap.Options` - Define the options accepted by the twistd procmon plugin.
    - `twisted.scripts.htmlizer.Options` - Undocumented
    - `twisted.scripts.trial.Options` - Options to the trial command line tool.
    - `twisted.tap.ftp.Options` - No class docstring; 0/4 class variable, 1/2 method documented
    - `twisted.tap.portforward.Options` - Undocumented
    - `twisted.tap.socks.Options` - Undocumented
    - `twisted.trial._dist.options.WorkerOptions` - Options forwarded to the trial distributed worker.
    - `twisted.web.tap.Options` - Define the options accepted by the twistd web plugin.
    - `twisted.words.tap.Options` - No class docstring; 0/5 class variable, 2/3 methods documented
    - `twisted.words.xmpproutertap.Options` - Undocumented
- `enum.Enum`
  - `twisted.internet.defer._Sentinel` - No summary
- `enum.IntEnum`
  - `twisted.application.runner._exit.ExitStatus` - Standard exit status codes for system programs.
- `Exception`
  - `twisted._threads.AlreadyQuit` - This worker worker is dead and cannot execute more instructions.
  - `twisted.application.runner._pidfile.AlreadyRunningError` - Process is already running.
  - `twisted.application.runner._pidfile.InvalidPIDFileError` - PID file contents are invalid.
  - `twisted.application.runner._pidfile.NoPIDFound` - No PID found in PID file.
  - `twisted.application.runner._pidfile.StalePIDFileError` - PID file contents are valid, but there is no process with the referenced PID.
  - `twisted.conch.endpoints.AuthenticationFailed` - An SSH session could not be established because authentication was not successful.
  - `twisted.conch.error.ConchError` - Undocumented
  - `twisted.conch.error.HostKeyChanged` - The host key of a remote host has changed.
  - `twisted.conch.error.IgnoreAuthentication` - This is thrown to let the UserAuthServer know it doesn't need to handle the authentication anymore.
  - `twisted.conch.error.InvalidEntry` - An entry in a known_hosts file could not be interpreted as a valid entry.
  - `twisted.conch.error.MissingKeyStoreError` - Raised if an SSHAgentServer starts receiving data without its factory providing a keys dict on which to read/write key data.
  - `twisted.conch.error.NotEnoughAuthentication` - This is thrown if the authentication is valid, but is not enough to successfully verify the user. i.e. don't retry this type of authentication, try another one.
  - `twisted.conch.error.UserRejectedKey` - The user interactively rejected a key.
  - `twisted.conch.insults.helper.ExpectationTimeout` - Undocumented
  - `twisted.conch.insults.window.YieldFocus` - Input focus manipulation exception
  - `twisted.conch.ssh.filetransfer.SFTPError` - No class docstring; 1/1 property, 0/3 instance variable, 0/2 method documented
  - `twisted.conch.ssh.keys.BadFingerPrintFormat` - Raises when unsupported fingerprint formats are presented to fingerprint.
  - `twisted.conch.ssh.keys.BadKeyError` - Raised when a key isn't what we expected from it.
  - `twisted.conch.ssh.keys.EncryptedKeyError` - Raised when an encrypted key is presented to fromString/fromFile without a password.
  - `twisted.conch.ssh.keys.PassphraseNormalizationError` - Raised when a passphrase contains Unicode characters that cannot be normalized using the available Unicode character database.
  - `twisted.conch.stdio.UnexpectedOutputError` - Undocumented
  - `twisted.conch.telnet.TelnetError` - Undocumented
    - `twisted.conch.telnet.NegotiationError` - Undocumented
      - `twisted.conch.telnet.AlreadyDisabled` - Undocumented
      - `twisted.conch.telnet.AlreadyEnabled` - Undocumented
      - `twisted.conch.telnet.AlreadyNegotiating` - Undocumented
      - `twisted.conch.telnet.OptionRefused` - Undocumented
  - `twisted.cred.error.LoginFailed` - The user's request to log in failed for some reason.
    - `twisted.cred.error.LoginDenied` - The realm rejected this login for some reason.
    - `twisted.cred.error.UnauthorizedLogin` - The user was not authorized to log in.
      - `twisted.conch.error.ValidPublicKey` - Raised by public key checkers when they receive public key credentials that don't contain a signature at all, but are valid in every other way. (e.g. the public key matches one in the user's authorized_keys file).
    - `twisted.cred.error.UnhandledCredentials` - No summary
  - `twisted.cred.error.Unauthorized` - Standard unauthorized error.
    - `twisted.cred.error.UnauthorizedLogin` - The user was not authorized to log in.
      - `twisted.conch.error.ValidPublicKey` - Raised by public key checkers when they receive public key credentials that don't contain a signature at all, but are valid in every other way. (e.g. the public key matches one in the user's authorized_keys file).
  - `twisted.cred.strcred.StrcredException` - Base exception class for strcred.
    - `twisted.cred.strcred.InvalidAuthArgumentString` - Raised by an authentication plugin when the argument string provided is formatted incorrectly.
    - `twisted.cred.strcred.InvalidAuthType` - Raised when a user provides an invalid identifier for the authentication plugin (known as the authType).
    - `twisted.cred.strcred.UnsupportedInterfaces` - Raised when an application is given a checker to use that does not provide any of the application's supported credentials interfaces.
  - `twisted.enterprise.adbapi.ConnectionLost` - This exception means that a db connection has been lost. Client code may try again.
  - `twisted.internet._sslverify.SimpleVerificationError` - Not a very useful verification error.
  - `twisted.internet.defer._InternalInlineCallbacksCancelledError` - A unique exception used only in `_cancellableInlineCallbacks` to verify that an `inlineCallbacks` is being cancelled as expected.
  - `twisted.internet.defer.AlreadyCalledError` - This error is raised when one of `Deferred.callback` or `Deferred.errback` is called after one of the two had already been called.
  - `twisted.internet.defer.AlreadyTryingToLockError` - Raised when `DeferredFilesystemLock.deferUntilLocked` is called twice on a single `DeferredFilesystemLock`.
  - `twisted.internet.defer.CancelledError` - This error is raised by default when a `Deferred` is cancelled.
  - `twisted.internet.defer.FirstError` - First error to occur in a `DeferredList` if `fireOnOneErrback` is set.
  - `twisted.internet.defer.QueueOverflow` - Undocumented
  - `twisted.internet.defer.QueueUnderflow` - Undocumented
  - `twisted.internet.defer.TimeoutError` - This error is raised by default when a `Deferred` times out.
    - `twisted.names.error.DNSQueryTimeoutError` - Indicates a lookup failed due to a timeout.
  - `twisted.internet.error.AlreadyListened` - An attempt was made to listen on a file descriptor which can only be listened on once.
  - `twisted.internet.error.BindError` - Undocumented
    - `twisted.internet.error.CannotListenError` - This gets raised by a call to startListening, when the object cannotstart listening.
  - `twisted.internet.error.CertificateError` - Undocumented
  - `twisted.internet.error.ConnectError` - Undocumented
    - `twisted.internet.error.BadFileError` - Undocumented
    - `twisted.internet.error.ConnectBindError` - Undocumented
    - `twisted.internet.error.ConnectionRefusedError` - Undocumented
    - `twisted.internet.error.NoRouteError` - Undocumented
    - `twisted.internet.error.ServiceNameUnknownError` - Undocumented
    - `twisted.internet.error.SSLError` - Undocumented
    - `twisted.internet.error.TCPTimedOutError` - Undocumented
    - `twisted.internet.error.UnknownHostError` - Undocumented
    - `twisted.internet.error.UserError` - Undocumented
      - `twisted.internet.error.TimeoutError` - Undocumented
  - `twisted.internet.error.ConnectingCancelledError` - An `Exception` that will be raised when an `IStreamClientEndpoint` is cancelled before it connects.
  - `twisted.internet.error.ConnectInProgressError` - A connect operation was started and isn't done yet.
  - `twisted.internet.error.ConnectionClosed` - Connection was closed, whether cleanly or non-cleanly.
    - `twisted.internet.error.ConnectionDone` - Undocumented
      - `twisted.internet.error.ProcessDone` - Undocumented
    - `twisted.internet.error.ConnectionLost` - Undocumented
      - `twisted.internet.error.ConnectionAborted` - Connection was aborted locally, using `twisted.internet.interfaces.ITCPTransport.abortConnection`.
      - `twisted.internet.error.ConnectionFdescWentAway` - Undocumented
      - `twisted.internet.error.FileDescriptorOverrun` - A mis-use of `IUNIXTransport.sendFileDescriptor` caused the connection to be closed.
      - `twisted.internet.error.ProcessTerminated` - No class docstring; 0/3 instance variable, 0/1 class variable, 0/1 constant, 1/1 method documented
  - `twisted.internet.error.MessageLengthError` - Undocumented
  - `twisted.internet.error.MulticastJoinError` - An attempt to join a multicast group failed.
  - `twisted.internet.error.NoProtocol` - An `Exception` that will be raised when the factory given to a `IStreamClientEndpoint` returns `None` from `buildProtocol`.
  - `twisted.internet.error.ProcessExitedAlready` - The process has already exited and the operation requested can no longer be performed.
  - `twisted.internet.error.UnsupportedAddressFamily` - An attempt was made to use a socket with an address family (eg AF_INET, AF_INET6, etc) which is not supported by the reactor.
  - `twisted.internet.error.UnsupportedSocketType` - An attempt was made to use a socket of a type (eg SOCK_STREAM, SOCK_DGRAM, etc) which is not supported by the reactor.
  - `twisted.internet.error.VerifyError` - Undocumented
    - `twisted.internet.error.PeerVerifyError` - Undocumented
  - `twisted.internet.task.SchedulerError` - No summary
    - `twisted.internet.task.NotPaused` - This exception is raised when a task is resumed which was not previously paused.
    - `twisted.internet.task.SchedulerStopped` - The operation could not complete because the scheduler was stopped in progress or was already stopped.
    - `twisted.internet.task.TaskFinished` - The operation could not complete because the task was already completed, stopped, encountered an error or otherwise permanently stopped running.
      - `twisted.internet.task.TaskDone` - The operation could not complete because the task was already completed.
      - `twisted.internet.task.TaskFailed` - The operation could not complete because the task died with an unhandled error.
      - `twisted.internet.task.TaskStopped` - The operation could not complete because the task was stopped.
  - `twisted.logger.InvalidLogLevelError` - Someone tried to use a `LogLevel` that is unknown to the logging system.
  - `twisted.mail._except._POP3MessageDeleted` - An internal control-flow error which indicates that a deleted message was requested.
  - `twisted.mail.alias.ProcessAliasTimeout` - An error indicating that a timeout occurred while waiting for a process to complete.
  - `twisted.mail.imap4.IMAP4Exception` - Undocumented
    - `twisted.mail.imap4.IllegalClientResponse` - Undocumented
    - `twisted.mail.imap4.IllegalIdentifierError` - Undocumented
    - `twisted.mail.imap4.IllegalMailboxEncoding` - Undocumented
    - `twisted.mail.imap4.IllegalOperation` - Undocumented
    - `twisted.mail.imap4.IllegalQueryError` - Undocumented
    - `twisted.mail.imap4.IllegalServerResponse` - Undocumented
    - `twisted.mail.imap4.MailboxException` - Undocumented
      - `twisted.mail.imap4.MailboxCollision` - Undocumented
      - `twisted.mail.imap4.NoSuchMailbox` - Undocumented
      - `twisted.mail.imap4.ReadOnlyMailbox` - Undocumented
    - `twisted.mail.imap4.MismatchedNesting` - Undocumented
    - `twisted.mail.imap4.MismatchedQuoting` - Undocumented
    - `twisted.mail.imap4.NegativeResponse` - Undocumented
    - `twisted.mail.imap4.NoSupportedAuthentication` - Undocumented
    - `twisted.mail.imap4.UnhandledResponse` - Undocumented
  - `twisted.mail.pop3.POP3ClientError` - The base class for all exceptions raised by POP3Client.
    - `twisted.mail.pop3.InsecureAuthenticationDisallowed` - An error indicating secure authentication was required but no mechanism could be found.
    - `twisted.mail.pop3.LineTooLong` - An error indicating that the server sent a line which exceeded the maximum line length (`LineOnlyReceiver.MAX_LENGTH`).
    - `twisted.mail.pop3.ServerErrorResponse` - An error indicating that the server returned an error response to a request.
    - `twisted.mail.pop3.TLSError` - An error indicating secure authentication was required but either the transport does not support TLS or no TLS context factory was supplied.
    - `twisted.mail.pop3.TLSNotSupportedError` - An error indicating secure authentication was required but the server does not support TLS.
  - `twisted.mail.pop3.POP3Error` - The base class for POP3 errors.
  - `twisted.mail.relaymanager.CanonicalNameChainTooLong` - An error indicating that when trying to look up a mail exchange host, too many canonical name records which point to other canonical name records were encountered and resolution was abandoned.
  - `twisted.mail.relaymanager.CanonicalNameLoop` - An error indicating that when trying to look up a mail exchange host, a set of canonical name records was found which form a cycle and resolution was abandoned.
  - `twisted.mail.smtp.SMTPError` - Undocumented
    - `twisted.mail.smtp.AddressError` - Parse error in address
    - `twisted.mail.smtp.SMTPClientError` - Base class for SMTP client errors.
      - `twisted.mail.smtp.ESMTPClientError` - Base class for ESMTP client errors.
        - `twisted.mail.smtp.AUTHDeclinedError` - The server rejected our credentials.
        - `twisted.mail.smtp.AuthenticationError` - An error occurred while authenticating.
        - `twisted.mail.smtp.AUTHRequiredError` - Authentication was required but the server does not support it.
        - `twisted.mail.smtp.EHLORequiredError` - The server does not support EHLO.
        - `twisted.mail.smtp.TLSError` - An error occurred while negiotiating for transport security.
        - `twisted.mail.smtp.TLSRequiredError` - Transport security was required but the server does not support it.
      - `twisted.mail.smtp.SMTPConnectError` - Failed to connect to the mail exchange host.
      - `twisted.mail.smtp.SMTPDeliveryError` - Indicates that a delivery attempt has had an error.
      - `twisted.mail.smtp.SMTPProtocolError` - The server sent a mangled response.
      - `twisted.mail.smtp.SMTPTimeoutError` - Failed to receive a response from the server in the expected time period.
    - `twisted.mail.smtp.SMTPServerError` - Undocumented
      - `twisted.mail.smtp.SMTPAddressError` - Undocumented
        - `twisted.mail.smtp.SMTPBadRcpt` - Undocumented
        - `twisted.mail.smtp.SMTPBadSender` - Undocumented
  - `twisted.names.error.ResolverError` - Indicates a query failed because of a decision made by the local resolver object.
  - `twisted.persisted.aot.NonFormattableDict` - A dictionary was not formattable.
  - `twisted.positioning.base.InvalidChecksum` - An exception raised when the checksum of a sentence is invalid.
  - `twisted.positioning.base.InvalidSentence` - An exception raised when a sentence is invalid.
  - `twisted.protocols.amp.AmpError` - Base class of all Amp-related exceptions.
    - `twisted.protocols.amp.BadLocalReturn` - A bad value was returned from a local command; we were unable to coerce it.
    - `twisted.protocols.amp.IncompatibleVersions` - It was impossible to negotiate a compatible version of the protocol with the other end of the connection.
    - `twisted.protocols.amp.InvalidSignature` - You didn't pass all the required arguments.
    - `twisted.protocols.amp.MalformedAmpBox` - This error indicates that the wire-level protocol was malformed.
    - `twisted.protocols.amp.NoEmptyBoxes` - You can't have empty boxes on the connection. This is raised when you receive or attempt to send one.
    - `twisted.protocols.amp.OnlyOneTLS` - This is an implementation limitation; TLS may only be started once per connection.
    - `twisted.protocols.amp.RemoteAmpError` - This error indicates that something went wrong on the remote end of the connection, and the error was serialized and transmitted to you.
      - `twisted.protocols.amp.UnknownRemoteError` - This means that an error whose type we can't identify was raised from the other side.
    - `twisted.protocols.amp.TooLong` - One of the protocol's length limitations was violated.
    - `twisted.protocols.amp.UnhandledCommand` - A command received via amp could not be dispatched.
  - `twisted.protocols.amp.ProtocolSwitched` - Connections which have been switched to other protocols can no longer accept traffic at the AMP level. This is raised when you try to send it.
  - `twisted.protocols.basic.IncompleteNetstring` - Not enough data to complete a netstring.
  - `twisted.protocols.dict.InvalidResponse` - Undocumented
  - `twisted.protocols.ftp.FTPCmdError` - Generic exception for FTP commands.
    - `twisted.protocols.ftp.AnonUserDeniedError` - Raised when an anonymous user issues a command that will alter the filesystem
    - `twisted.protocols.ftp.AuthorizationError` - Raised when client authentication fails.
    - `twisted.protocols.ftp.BadCmdSequenceError` - Raised when a client sends a series of commands in an illogical sequence.
    - `twisted.protocols.ftp.CmdArgSyntaxError` - Raised when a command is called with wrong value or a wrong number of arguments.
    - `twisted.protocols.ftp.CmdNotImplementedError` - Raised when an unimplemented command is given to the server.
    - `twisted.protocols.ftp.CmdNotImplementedForArgError` - Raised when the handling of a parameter for a command is not implemented by the server.
    - `twisted.protocols.ftp.CmdSyntaxError` - Raised when a command syntax is wrong.
    - `twisted.protocols.ftp.FileExistsError` - Raised when attempted to override an existing resource.
    - `twisted.protocols.ftp.FileNotFoundError` - Raised when trying to access a non existent file or directory.
    - `twisted.protocols.ftp.IsADirectoryError` - Raised when DELE is called on a path that is a directory.
    - `twisted.protocols.ftp.IsNotADirectoryError` - Raised when RMD is called on a path that isn't a directory.
    - `twisted.protocols.ftp.PermissionDeniedError` - Raised when access is attempted to a resource to which access is not allowed.
  - `twisted.protocols.ftp.FTPError` - Undocumented
    - `twisted.protocols.ftp.BadResponse` - Undocumented
    - `twisted.protocols.ftp.CommandFailed` - Undocumented
    - `twisted.protocols.ftp.ConnectionLost` - Undocumented
    - `twisted.protocols.ftp.UnexpectedData` - Undocumented
    - `twisted.protocols.ftp.UnexpectedResponse` - Undocumented
  - `twisted.protocols.ftp.InvalidPath` - Internal exception used to signify an error during parsing a path.
  - `twisted.protocols.ftp.PortConnectionError` - Undocumented
  - `twisted.protocols.haproxy._exceptions.InvalidProxyHeader` - The provided PROXY protocol header is invalid.
    - `twisted.protocols.haproxy._exceptions.InvalidNetworkProtocol` - The network protocol was not one of TCP4 TCP6 or UNKNOWN.
    - `twisted.protocols.haproxy._exceptions.MissingAddressData` - The address data is missing or incomplete.
  - `twisted.protocols.ident.IdentError` - Can't determine connection owner; reason unknown.
    - `twisted.protocols.ident.HiddenUser` - The server was able to identify the user of this port, but the information was not returned at the request of the user.
    - `twisted.protocols.ident.InvalidPort` - No summary
    - `twisted.protocols.ident.NoUser` - The connection specified by the port pair is not currently in use or currently not owned by an identifiable entity.
  - `twisted.protocols.memcache.ClientError` - Error caused by an invalid client call.
  - `twisted.protocols.memcache.NoSuchCommand` - Exception raised when a non existent command is called.
  - `twisted.protocols.memcache.ServerError` - Problem happening on the server.
  - `twisted.protocols.sip.SIPError` - Undocumented
    - `twisted.protocols.sip.RegistrationError` - Registration was not possible.
  - `twisted.python._inotify.INotifyError` - Unify all the possible exceptions that can be raised by the INotify API.
  - `twisted.python._release.NoDocumentsFound` - Raised when no input documents are found.
  - `twisted.python._release.NotWorkingDirectory` - Raised when a directory does not appear to be a repository directory of a supported VCS.
  - `twisted.python.failure.DefaultException` - Undocumented
  - `twisted.python.failure.NoCurrentExceptionError` - Raised when trying to create a Failure from the current interpreter exception state and there is no current exception state.
  - `twisted.python.filepath.InsecurePath` - Error that is raised when the path provided to `FilePath` is invalid.
  - `twisted.python.filepath.LinkError` - An error with symlinks - either that there are cyclical symlinks or that symlink are not supported on this platform.
  - `twisted.python.formmethod.FormException` - An error occurred calling the form method.
    - `twisted.python.formmethod.InputError` - An error occurred with some input.
  - `twisted.python.rebuild.RebuildError` - Exception raised when trying to rebuild a class whereas it's not possible.
  - `twisted.python.reflect._NoModuleFound` - No module was found because none exists.
  - `twisted.python.roots.ConstraintViolation` - An exception raised when a constraint is violated.
  - `twisted.python.usage.UsageError` - Undocumented
  - `twisted.runner.inetdconf.InvalidConfError` - Invalid configuration file
    - `twisted.runner.inetdconf.InvalidInetdConfError` - Invalid inetd.conf file
    - `twisted.runner.inetdconf.InvalidServicesConfError` - Invalid services file
  - `twisted.runner.inetdconf.UnknownService` - Unknown service name
  - `twisted.scripts.trial._DebuggerNotFound` - A debugger import failed.
  - `twisted.spread.banana.BananaError` - Undocumented
  - `twisted.spread.jelly.InsecureJelly` - This exception will be raised when a jelly is deemed `insecure'; e.g. it contains a type, class, or module disallowed by the specified `taster'
  - `twisted.spread.pb.Error` - This error can be raised to generate known error conditions.
  - `twisted.spread.pb.PBConnectionLost` - Undocumented
  - `twisted.spread.pb.ProtocolError` - This error is raised when an invalid protocol statement is received.
    - `twisted.spread.pb.DeadReferenceError` - This error is raised when a method is called on a dead reference (one whose broker has been disconnected).
  - `twisted.spread.pb.RemoteError` - This class is used to wrap a string-ified exception from the remote side to be able to reraise it. (Raising string exceptions is no longer possible in Python 2.6+)
  - `twisted.trial._synctest.UnsupportedTrialFeature` - A feature of twisted.trial was used that pyunit cannot support.
  - `twisted.trial.util._NoTrialMarker` - No trial marker file could be found.
  - `twisted.trial.util._WorkingDirectoryBusy` - A working directory was specified to the runner, but another test run is currently using that directory.
  - `twisted.trial.util.DirtyReactorAggregateError` - Passed to `twisted.trial.itrial.IReporter.addError` when the reactor is left in an unclean state after a test.
  - `twisted.web._newclient._WrapperException` - `_WrapperException` is the base exception type for exceptions which include one or more other exceptions as the low-level causes.
    - `twisted.web.client.RequestGenerationFailed` - There was an error while creating the bytes which make up a request.
    - `twisted.web.client.RequestTransmissionFailed` - There was an error while sending the bytes which make up a request.
    - `twisted.web.client.ResponseFailed` - `ResponseFailed` indicates that all of the response to a request was not received for some reason.
      - `twisted.web.client.ResponseNeverReceived` - A `ResponseFailed` that knows no response bytes at all have been received.
  - `twisted.web._newclient.BadHeaders` - Headers passed to `Request` were in some way invalid.
  - `twisted.web._newclient.ConnectionAborted` - The connection was explicitly aborted by application code.
  - `twisted.web._newclient.ExcessWrite` - The body `IBodyProducer` for a request tried to write data after indicating it had finished writing data.
  - `twisted.web._newclient.ParseError` - Some received data could not be parsed.
    - `twisted.web._newclient.BadResponseVersion` - The version string in a status line was unparsable.
  - `twisted.web._newclient.RequestNotSent` - No summary
  - `twisted.web._newclient.WrongBodyLength` - An `IBodyProducer` declared the number of bytes it was going to produce (via its `length` attribute) and then produced a different number of bytes.
  - `twisted.web.client.ResponseDone` - `ResponseDone` may be passed to `IProtocol.connectionLost` on the protocol passed to `Response.deliverBody` and indicates that the entire response has been delivered.
  - `twisted.web.domhelpers.NodeLookupError` - Undocumented
  - `twisted.web.error.Error` - A basic HTTP error.
    - `twisted.web.client.PartialDownloadError` - Page was only partially downloaded, we got disconnected in middle.
    - `twisted.web.error.InfiniteRedirection` - HTTP redirection is occurring endlessly.
    - `twisted.web.error.PageRedirect` - A request resulted in an HTTP redirect.
    - `twisted.web.error.RedirectWithNoLocation` - Exception passed to `ResponseFailed` if we got a redirect without a `Location` header field.
  - `twisted.web.error.ExcessiveBufferingError` - The HTTP/2 protocol has been forced to buffer an excessive amount of outbound data, and has therefore closed the connection and dropped all outbound data.
  - `twisted.web.error.FlattenerError` - An error occurred while flattening an object.
  - `twisted.web.error.RenderError` - Base exception class for all errors which can occur during template rendering.
    - `twisted.web.error.MissingRenderMethod` - Tried to use a render method which does not exist.
    - `twisted.web.error.MissingTemplateLoader` - `MissingTemplateLoader` is raised when trying to render an Element without a template loader, i.e. a `loader` attribute.
  - `twisted.web.error.SchemeNotSupported` - The scheme of a URI was not one of the supported values.
  - `twisted.web.error.UnexposedMethodError` - Raised on any attempt to get a method which has not been exposed.
  - `twisted.web.error.UnfilledSlot` - During flattening, a slot with no associated data was encountered.
  - `twisted.web.error.UnsupportedMethod` - Raised by a resource when faced with a strange request method.
  - `twisted.web.error.UnsupportedSpecialHeader` - A HTTP/2 request was received that contained a HTTP/2 pseudo-header field that is not recognised by Twisted.
  - `twisted.web.error.UnsupportedType` - During flattening, an object of a type which cannot be flattened was encountered.
  - `twisted.web.http._DataLoss` - No summary
  - `twisted.web.http._MalformedChunkedDataError` - No summary
  - `twisted.web.http.PotentialDataLoss` - No summary
  - `twisted.web.microdom.MismatchedTags` - Undocumented
  - `twisted.web.script.AlreadyCached` - This exception is raised when a path has already been cached.
  - `twisted.web.sux.ParseError` - Undocumented
  - `twisted.words.ewords.WordsError` - Undocumented
    - `twisted.words.ewords.AlreadyLoggedIn` - Undocumented
    - `twisted.words.ewords.DuplicateGroup` - Undocumented
    - `twisted.words.ewords.DuplicateUser` - Undocumented
    - `twisted.words.ewords.NoSuchGroup` - Undocumented
    - `twisted.words.ewords.NoSuchUser` - Undocumented
  - `twisted.words.im.locals.OfflineError` - The requested action can't happen while offline.
  - `twisted.words.protocols.irc.IRCBadMessage` - Undocumented
  - `twisted.words.protocols.irc.IRCPasswordMismatch` - Undocumented
  - `twisted.words.protocols.jabber.error.BaseError` - Base class for XMPP error exceptions.
    - `twisted.words.protocols.jabber.error.StanzaError` - Stanza Error exception.
    - `twisted.words.protocols.jabber.error.StreamError` - Stream Error exception.
  - `twisted.words.protocols.jabber.jid.InvalidFormat` - The given string could not be parsed into a valid Jabber Identifier (JID).
  - `twisted.words.protocols.jabber.sasl.SASLError` - SASL base exception.
    - `twisted.words.protocols.jabber.sasl.SASLAuthError` - SASL Authentication failed.
    - `twisted.words.protocols.jabber.sasl.SASLIncorrectEncodingError` - SASL base64 encoding was incorrect.
    - `twisted.words.protocols.jabber.sasl.SASLNoAcceptableMechanism` - The server did not present an acceptable SASL mechanism.
  - `twisted.words.protocols.jabber.xmlstream.FeatureNotAdvertized` - Exception indicating a stream feature was not advertized, while required by the initiating entity.
  - `twisted.words.protocols.jabber.xmlstream.TimeoutError` - Exception raised when no IQ response has been received before the configured timeout.
  - `twisted.words.protocols.jabber.xmlstream.TLSError` - TLS base exception.
    - `twisted.words.protocols.jabber.xmlstream.TLSFailed` - Exception indicating failed TLS negotiation
    - `twisted.words.protocols.jabber.xmlstream.TLSNotSupported` - Exception indicating missing TLS support.
    - `twisted.words.protocols.jabber.xmlstream.TLSRequired` - Exception indicating required TLS negotiation.
  - `twisted.words.xish.domish.ParserError` - Exception thrown when a parsing error occurs
- `Generic[_DeferredResultT]`
  - `twisted.internet.defer._ConcurrencyPrimitive` - No class docstring; 0/1 instance variable, 2/7 methods documented
    - `twisted.internet.defer.DeferredLock` - A lock for event driven systems.
    - `twisted.internet.defer.DeferredSemaphore` - A semaphore for event driven systems.
- `Generic[_T]`
  - `twisted.internet.defer.DeferredQueue` - An event driven queue.
- `io.BytesIO`
  - `twisted.internet.testing.StringIOWithoutClosing` - A BytesIO that can't be closed.
- `IOError`
  - `twisted.internet.error.DNSLookupError` - Undocumented
  - `twisted.internet.utils._UnexpectedErrorOutput` - Standard error data was received where it was not expected. This is a subclass of `IOError` to preserve backward compatibility with the previous error behavior of `getProcessOutput`.
- `KeyError`
  - `twisted.application.reactors.NoSuchReactor` - Raised when an attempt is made to install a reactor which cannot be found.
- `namedtuple('_TunnelDescription', 'fileno name')`
  - `twisted.pair.tuntap._TunnelDescription` - Describe an existing tunnel.
- `NotImplementedError`
  - `twisted.python.roots.NotSupportedError` - An exception meaning that the tree-manipulation operation you're attempting to perform is not supported.
- `OSError`
  - `twisted.python.filepath.UnlistableError` - An exception which is used to distinguish between errors which mean 'this is not a directory you can list' and other, more catastrophic errors.
  - `twisted.python.release.CommandFailed` - Undocumented
  - `twisted.python.release.DirectoryDoesntExist` - Some directory doesn't exist when it should.
  - `twisted.python.release.DirectoryExists` - Some directory exists when it shouldn't.
  - `twisted.python.win32.FakeWindowsError` - Stand-in for sometimes-builtin exception on platforms for which it is missing.
- `proxyForInterface(_IProcessTransportWithConsumerAndProducer, '_process')`
  - `twisted.internet.endpoints._ProcessEndpointTransport` - An `ITransport`, `IProcessTransport`, `IConsumer`, and `IPushProducer` provider for the `IProtocol` instance passed to the process endpoint.
- `proxyForInterface(IProtocol)`
  - `twisted.web.client._GzipProtocol` - A `Protocol` implementation which wraps another one, transparently decompressing received data.
- `proxyForInterface(IProtocol, '_channel')`
  - `twisted.web.http._GenericHTTPChannelProtocol` - A proxy object that wraps one of the HTTP protocol objects, and switches between them depending on TLS negotiated protocol.
- `proxyForInterface(IReporter)`
  - `twisted.trial._dist.distreporter.DistReporter` - See module docstring.
- `proxyForInterface(IRequest, '_request')`
  - `twisted.web.http._XForwardedForRequest` - Add a layer on top of another request that only uses the value of an X-Forwarded-For header as the result of `getClientAddress`.
- `proxyForInterface(IResource)`
  - `twisted.web.resource.EncodingResourceWrapper` - Wrap a `IResource`, potentially applying an encoding to the response body generated.
- `proxyForInterface(IResponse)`
  - `twisted.web.client.GzipDecoder` - A wrapper for a `Response` instance which handles gzip'ed body.
- `proxyForInterface(itrial.IReporter, '_originalReporter')`
  - `twisted.trial.reporter.TestResultDecorator` - Base class for TestResult decorators.
    - `twisted.trial.reporter._AdaptedReporter` - TestResult decorator that makes sure that addError only gets tests that have been adapted with a particular test adapter.
    - `twisted.trial.reporter._ExitWrapper` - A wrapper for a reporter that causes the reporter to stop after unsuccessful tests.
    - `twisted.trial.reporter.UncleanWarningsReporterWrapper` - A wrapper for a reporter that converts `util.DirtyReactorAggregateError`s to warnings.
- `pydoctor.sphinx.SphinxInventory`
  - `twisted.python._pydoctor.TwistedSphinxInventory` - Custom SphinxInventory to work around broken external references to Sphinx.
- `pydoctor.zopeinterface.ZopeInterfaceASTBuilder`
  - `twisted.python._pydoctor.TwistedASTBuilder` - Undocumented
- `pydoctor.zopeinterface.ZopeInterfaceModuleVisitor`
  - `twisted.python._pydoctor.TwistedModuleVisitor` - No class docstring; 2/2 methods documented
- `pydoctor.zopeinterface.ZopeInterfaceSystem`
  - `twisted.python._pydoctor.TwistedSystem` - A PyDoctor "system" used to generate the docs.
- `RuntimeError`
  - `twisted.internet.error.NotConnectingError` - Undocumented
  - `twisted.internet.error.NotListeningError` - Undocumented
  - `twisted.internet.error.ReactorAlreadyRunning` - Error raised when trying to start the reactor multiple times.
  - `twisted.internet.error.ReactorNotRestartable` - Error raised when trying to run a reactor which was stopped.
  - `twisted.internet.error.ReactorNotRunning` - Error raised when trying to stop a reactor which is not running.
  - `twisted.python.randbytes.SecureRandomNotAvailable` - Exception raised when no secure random algorithm is found.
  - `twisted.python.randbytes.SourceNotAvailable` - Internal exception used when a specific random source is not available.
  - `twisted.words.protocols.irc.UnhandledCommand` - A command dispatcher could not locate an appropriate command handler.
- `str`
  - `twisted.words.xish.domish.SerializedXML` - Marker class for pre-serialized XML in the DOM.
  - `twisted.words.xish.xpath.LiteralValue` - Undocumented
- `tkinter.Frame`
  - `twisted.conch.scripts.tkconch.TkConchMenu` - Undocumented
  - `twisted.conch.ui.tkvt100.VT100Frame` - Undocumented
- `tuple`
  - `twisted.conch.ssh.transport._MACParams` - `_MACParams` represents the parameters necessary to compute SSH MAC (Message Authenticate Codes).
- `twisted._threads._convenience.Quit` - A flag representing whether a worker has been quit.
- `twisted._threads._memory.MemoryWorker` - An `IWorker` that queues work for later performance.
- `twisted._threads._team.Statistics` - Statistics about a `Team`'s current activity.
- `twisted._threads.LockWorker` - An `IWorker` implemented based on a mutual-exclusion lock.
- `twisted._threads.Team` - A composite `IWorker` implementation.
- `twisted._threads.ThreadWorker` - An `IExclusiveWorker` implemented based on a single thread and a queue.
- `twisted.application.app._BasicProfiler` -
  - `twisted.application.app.CProfileRunner` - Runner for the cProfile module.
  - `twisted.application.app.ProfileRunner` - Runner for the standard profile module.
- `twisted.application.app.ApplicationRunner` - An object which helps running an application based on a config object.
  - `twisted.scripts._twistd_unix.UnixApplicationRunner` - An ApplicationRunner which does Unix-specific things, like fork, shed privileges, and maintain a PID file.
  - `twisted.scripts._twistw.WindowsApplicationRunner` - An ApplicationRunner which avoids unix-specific things. No forking, no PID files, no privileges.
- `twisted.application.app.AppLogger` - An `AppLogger` attaches the configured log observer specified on the commandline to a `ServerOptions` object, a custom `logger.ILogObserver`, or a legacy custom {log.ILogObserver}.
  - `twisted.scripts._twistd_unix.UnixAppLogger` - A logger able to log to syslog, to files, and to stdout.
- `twisted.application.app.AppProfiler` - Class which selects a specific profile runner based on configuration options.
- `twisted.application.app.ReactorSelectionMixin` - Provides options for selecting a reactor to install.
  - `twisted.application.app.ServerOptions` - No class docstring; 0/1 property, 0/1 instance variable, 0/5 class variable, 2/5 methods documented
    - `twisted.scripts._twistd_unix.ServerOptions` - No class docstring; 0/4 class variable, 1/2 method documented
    - `twisted.scripts._twistw.ServerOptions` - No class docstring; 0/2 class variable, 1/1 method documented
  - `twisted.scripts.trial.Options` - Options to the trial command line tool.
  - `twisted.trial._dist.options.WorkerOptions` - Options forwarded to the trial distributed worker.
- `twisted.application.internet._ClientMachine` - State machine for maintaining a single outgoing connection to an endpoint.
- `twisted.application.internet._DisconnectFactory` - A `_DisconnectFactory` is a proxy for `IProtocolFactory` that catches `connectionLost` notifications and relays them.
- `twisted.application.internet._ReconnectingProtocolProxy` - A proxy for a Protocol to provide connectionLost notification to a client connection service, in support of reconnecting when connections are lost.
- `twisted.application.reactors.Reactor` -
- `twisted.application.runner._exit.Status` - Object to hang `EX_*` values off of as a substitute for `posix`.
- `twisted.application.runner._pidfile.NonePIDFile` - PID file implementation that does nothing.
- `twisted.application.runner._pidfile.PIDFile` - Concrete implementation of `IPIDFile`.
- `twisted.application.runner._runner.Runner` - Twisted application runner.
- `twisted.application.service.Process` - Process running parameters.
- `twisted.application.service.Service` - Base class for services.
  - `twisted.application.internet._VolatileDataService` - Undocumented
    - `twisted.application.internet._AbstractClient` -
      - `twisted.application.internet.SSLClient` - Undocumented
      - `twisted.application.internet.TCPClient` - Undocumented
      - `twisted.application.internet.UNIXClient` - Undocumented
      - `twisted.application.internet.UNIXDatagramClient` - Undocumented
    - `twisted.application.internet._AbstractServer` -
      - `twisted.application.internet.MulticastServer` - Undocumented
      - `twisted.application.internet.SSLServer` - Undocumented
      - `twisted.application.internet.TCPServer` - Undocumented
      - `twisted.application.internet.UDPServer` - Undocumented
      - `twisted.application.internet.UNIXDatagramServer` - Undocumented
      - `twisted.application.internet.UNIXServer` - Undocumented
    - `twisted.application.internet.TimerService` - Service to periodically call a function
      - `twisted.mail.mail.FileMonitoringService` - A service for monitoring changes to files.
  - `twisted.application.internet.ClientService` - A `ClientService` maintains a single outgoing connection to a client endpoint, reconnecting after a configurable timeout when a connection fails, either before or after connecting.
  - `twisted.application.internet.CooperatorService` - Simple `service.IService` which starts and stops a `twisted.internet.task.Cooperator`.
  - `twisted.application.internet.StreamServerEndpointService` - A `StreamServerEndpointService` is an `IService` which runs a server on a listening port described by an `IStreamServerEndpoint`.
  - `twisted.application.service.MultiService` - Straightforward Service Container.
    - `twisted.mail.mail.MailService` - An email service.
    - `twisted.words.protocols.jabber.component.ServiceManager` - Business logic for a managed component connection to a Jabber router.
  - `twisted.names.secondary.SecondaryAuthorityService` - A service that keeps one or more authorities up to date by doing hourly zone transfers from a master.
  - `twisted.runner.procmon.ProcessMonitor` - ProcessMonitor runs processes, monitors their progress, and restarts them when they die.
  - `twisted.words.protocols.jabber.component.Service` - External server-side component service.
- `twisted.application.service.ServiceMaker` - Utility class to simplify the definition of `IServiceMaker` plugins.
- `twisted.application.twist._twist.Twist` - Run a Twisted application.
- `twisted.conch.avatar.ConchUser` - Undocumented
  - `twisted.conch.manhole_ssh.TerminalUser` - Undocumented
  - `twisted.conch.unix.UnixConchUser` - Undocumented
- `twisted.conch.checkers.InMemorySSHKeyDB` - Object that provides SSH public keys based on a dictionary of usernames mapped to `twisted.conch.ssh.keys.Key`s.
- `twisted.conch.checkers.SSHProtocolChecker` - SSHProtocolChecker is a checker that requires multiple authentications to succeed. To add a checker, call my registerChecker method with the checker and the interface.
- `twisted.conch.checkers.SSHPublicKeyChecker` - Checker that authenticates SSH public keys, based on public keys listed in authorized_keys and authorized_keys2 files in user .ssh/ directories.
- `twisted.conch.checkers.SSHPublicKeyDatabase` - Checker that authenticates SSH public keys, based on public keys listed in authorized_keys and authorized_keys2 files in user .ssh/ directories.
- `twisted.conch.checkers.UNIXAuthorizedKeysFiles` - No summary
- `twisted.conch.checkers.UNIXPasswordDatabase` - A checker which validates users out of the UNIX password databases, or databases of a compatible format.
- `twisted.conch.client.knownhosts._BaseEntry` - Abstract base of both hashed and non-hashed entry objects, since they represent keys and key types the same way.
  - `twisted.conch.client.knownhosts.HashedEntry` - A `HashedEntry` is a representation of an entry in a known_hosts file where the hostname has been hashed and salted.
  - `twisted.conch.client.knownhosts.PlainEntry` - A `PlainEntry` is a representation of a plain-text entry in a known_hosts file.
- `twisted.conch.client.knownhosts.ConsoleUI` - A UI object that can ask true/false questions and post notifications on the console, to be used during key verification.
- `twisted.conch.client.knownhosts.KnownHostsFile` - A structured representation of an OpenSSH-format ~/.ssh/known_hosts file.
- `twisted.conch.client.knownhosts.UnparsedEntry` - `UnparsedEntry` is an entry in a `KnownHostsFile` which can't actually be parsed; therefore it matches no keys and no hosts.
- `twisted.conch.endpoints._ExistingConnectionHelper` - `_ExistingConnectionHelper` implements `_ISSHConnectionCreator` by handing out an existing SSH connection which is supplied to its initializer.
- `twisted.conch.endpoints._NewConnectionHelper` - `_NewConnectionHelper` implements `_ISSHConnectionCreator` by establishing a brand new SSH connection, securing it, and authenticating.
- `twisted.conch.endpoints._ReadFile` - A weakly file-like object which can be used with `KnownHostsFile` to respond in the negative to all prompts for decisions.
- `twisted.conch.endpoints.SSHCommandAddress` - An `SSHCommandAddress` instance represents the address of an SSH server, a username which was used to authenticate with that server, and a command which was run there.
- `twisted.conch.endpoints.SSHCommandClientEndpoint` - `SSHCommandClientEndpoint` exposes the command-executing functionality of SSH servers.
- `twisted.conch.insults.insults._const` -
- `twisted.conch.insults.insults.ClientProtocol.ControlSequenceParser` - Undocumented
- `twisted.conch.insults.insults.modes` - ECMA 48 standardized modes
- `twisted.conch.insults.insults.privateModes` - ANSI-Compatible Private Modes
- `twisted.conch.insults.insults.ServerProtocol.ControlSequenceParser` - Undocumented
- `twisted.conch.insults.insults.TerminalProtocol` - No class docstring; 0/1 instance variable, 1/6 method documented
  - `twisted.conch.recvline.RecvLine` - `TerminalProtocol` which adds line editing features.
    - `twisted.conch.recvline.HistoricRecvLine` - `TerminalProtocol` which adds both basic line-editing features and input history.
      - `twisted.conch.manhole.Manhole` - Mediator between a fancy line source and an interactive interpreter.
        - `twisted.conch.manhole.ColoredManhole` - A REPL which syntax colors input as users type it.
          - `twisted.conch.stdio.ConsoleManhole` - A manhole protocol specifically for use with `stdio.StandardIO`.
- `twisted.conch.insults.insults.Vector` - Undocumented
- `twisted.conch.insults.window.BoundedTerminalWrapper` - Undocumented
- `twisted.conch.insults.window.Widget` - No class docstring; 0/4 instance variable, 0/1 class variable, 1/13 method documented
  - `twisted.conch.insults.window._Scrollbar` - Undocumented
    - `twisted.conch.insults.window.HorizontalScrollbar` - Undocumented
    - `twisted.conch.insults.window.VerticalScrollbar` - Undocumented
  - `twisted.conch.insults.window.Border` - Undocumented
  - `twisted.conch.insults.window.Button` - Undocumented
  - `twisted.conch.insults.window.Canvas` - Undocumented
  - `twisted.conch.insults.window.ContainerWidget` -
    - `twisted.conch.insults.window._Box` - Undocumented
      - `twisted.conch.insults.window.HBox` - Undocumented
      - `twisted.conch.insults.window.VBox` - Undocumented
    - `twisted.conch.insults.window.AbsoluteBox` - Undocumented
    - `twisted.conch.insults.window.Packer` - Undocumented
    - `twisted.conch.insults.window.TopWindow` - A top-level container object which provides focus wrap-around and paint scheduling.
  - `twisted.conch.insults.window.ScrolledArea` - A `ScrolledArea` contains another widget wrapped in a viewport and vertical and horizontal scrollbars for moving the viewport around.
  - `twisted.conch.insults.window.Selection` - Undocumented
  - `twisted.conch.insults.window.TextInput` - Undocumented
    - `twisted.conch.insults.window.PasswordInput` - Undocumented
  - `twisted.conch.insults.window.TextOutput` - Undocumented
    - `twisted.conch.insults.window.TextOutputArea` - Undocumented
  - `twisted.conch.insults.window.Viewport` - Undocumented
- `twisted.conch.manhole.FileWrapper` - Minimal write-file-like object.
- `twisted.conch.manhole.VT102Writer` - Colorizer for Python tokens.
- `twisted.conch.manhole_ssh._Glue` - A feeble class for making one attribute look like another.
- `twisted.conch.manhole_ssh.TerminalRealm` - Undocumented
- `twisted.conch.manhole_ssh.TerminalSessionTransport` - Undocumented
- `twisted.conch.manhole_tap._StupidRealm` - Undocumented
- `twisted.conch.manhole_tap.chainedProtocolFactory` - Undocumented
- `twisted.conch.manhole_tap.makeTelnetProtocol` - Undocumented
- `twisted.conch.mixin.BufferingMixin` - Mixin which adds write buffering.
- `twisted.conch.recvline.LocalTerminalBufferMixin` - A mixin for RecvLine subclasses which records the state of the terminal.
- `twisted.conch.recvline.Logging` - Wrapper which logs attribute lookups.
- `twisted.conch.recvline.TransportSequence` - An `ITerminalTransport` implementation which forwards calls to one or more other `ITerminalTransport`s.
- `twisted.conch.scripts.cftp.FileWrapper` - Undocumented
- `twisted.conch.scripts.conch._KeepAlive` - Undocumented
- `twisted.conch.ssh._kex._Curve25519SHA256` - Elliptic Curve Key Exchange using Curve25519 and SHA256. Defined in https://datatracker.ietf.org/doc/draft-ietf-curdle-ssh-curves/.
- `twisted.conch.ssh._kex._Curve25519SHA256LibSSH` - As `_Curve25519SHA256`, but with a pre-standardized algorithm name.
- `twisted.conch.ssh._kex._DHGroup14SHA1` - Diffie-Hellman key exchange with SHA-1 as HASH and Oakley Group 14 (2048-bit MODP Group). Defined in RFC 4253, 8.2.
- `twisted.conch.ssh._kex._DHGroupExchangeSHA1` - Diffie-Hellman Group and Key Exchange with SHA-1 as HASH. Defined in RFC 4419, 4.1.
- `twisted.conch.ssh._kex._DHGroupExchangeSHA256` - Diffie-Hellman Group and Key Exchange with SHA-256 as HASH. Defined in RFC 4419, 4.2.
- `twisted.conch.ssh._kex._ECDH256` - Elliptic Curve Key Exchange with SHA-256 as HASH. Defined in RFC 5656.
- `twisted.conch.ssh._kex._ECDH384` - Elliptic Curve Key Exchange with SHA-384 as HASH. Defined in RFC 5656.
- `twisted.conch.ssh._kex._ECDH512` - Elliptic Curve Key Exchange with SHA-512 as HASH. Defined in RFC 5656.
- `twisted.conch.ssh.filetransfer.ClientDirectory` - Undocumented
- `twisted.conch.ssh.filetransfer.ClientFile` - Undocumented
- `twisted.conch.ssh.keys.Key` - No summary
- `twisted.conch.ssh.service.SSHService` - No class docstring; 0/4 class variable, 3/4 methods documented
  - `twisted.conch.ssh.connection.SSHConnection` - An implementation of the 'ssh-connection' service. It is used to multiplex multiple channels over the single SSH connection.
    - `twisted.conch.endpoints._ConnectionReady` - `_ConnectionReady` is an `SSHConnection` (an SSH service) which only propagates the serviceStarted event to a `Deferred` to be handled elsewhere.
    - `twisted.conch.scripts.cftp.SSHConnection` - Undocumented
    - `twisted.conch.scripts.conch.SSHConnection` - Undocumented
    - `twisted.conch.scripts.tkconch.SSHConnection` - Undocumented
  - `twisted.conch.ssh.userauth.SSHUserAuthClient` - A service implementing the client side of 'ssh-userauth'.
    - `twisted.conch.client.default.SSHUserAuthClient` - No class docstring; 0/3 instance variable, 4/11 methods, 2/2 class methods documented
    - `twisted.conch.endpoints._UserAuth` - `_UserAuth` implements the client part of SSH user authentication in the convenient way a user might expect if they are familiar with the interactive ssh command line client.
    - `twisted.conch.scripts.tkconch.SSHUserAuthClient` - Undocumented
  - `twisted.conch.ssh.userauth.SSHUserAuthServer` - A service implementing the server side of the 'ssh-userauth' service. It is used to authenticate the user on the other side as being able to access this server.
- `twisted.conch.ssh.session._DummyTransport` - Undocumented
- `twisted.conch.ssh.transport._DummyAlgorithm` - An encryption algorithm that does not actually encrypt anything.
- `twisted.conch.ssh.transport._DummyCipher` - A cipher for the none encryption method.
- `twisted.conch.ssh.transport._NullEncryptionContext` - An encryption context that does not actually encrypt anything.
- `twisted.conch.ssh.transport.SSHCiphers` - SSHCiphers represents all the encryption operations that need to occur to encrypt and authenticate the SSH connection.
- `twisted.conch.telnet.ProtocolTransportMixin` - Undocumented
  - `twisted.conch.telnet.TelnetBootstrapProtocol` - Undocumented
  - `twisted.conch.telnet.TelnetTransport` -
- `twisted.conch.telnet.Telnet._OptionState` - Represents the state of an option on both sides of a telnet connection.
- `twisted.conch.telnet.Telnet._OptionState._Perspective` - No summary
- `twisted.conch.ui.ansi.AnsiParser` - Parser class for ANSI codes.
- `twisted.conch.ui.ansi.ColorText` - Represents an element of text along with the texts colors and additional attributes.
- `twisted.conch.unix.SFTPServerForUnixConchUser` - No class docstring; 0/1 instance variable, 1/17 method documented
- `twisted.conch.unix.SSHSessionForUnixConchUser` - No class docstring; 0/8 instance variable, 0/1 class variable, 2/11 methods documented
- `twisted.conch.unix.UnixSFTPDirectory` - Undocumented
- `twisted.conch.unix.UnixSFTPFile` - Undocumented
- `twisted.conch.unix.UnixSSHRealm` - Undocumented
- `twisted.cred.checkers.AllowAnonymousAccess` - A credentials checker that unconditionally grants anonymous access.
- `twisted.cred.checkers.FilePasswordDB` - A file-based, text-based username/password database.
- `twisted.cred.checkers.InMemoryUsernamePasswordDatabaseDontUse` - An extremely simple credentials checker.
- `twisted.cred.credentials.Anonymous` - Undocumented
- `twisted.cred.credentials.CramMD5Credentials` - An encapsulation of some CramMD5 hashed credentials.
- `twisted.cred.credentials.DigestCredentialFactory` - Support for RFC2617 HTTP Digest Authentication
- `twisted.cred.credentials.DigestedCredentials` - Yet Another Simple HTTP Digest authentication scheme.
- `twisted.cred.credentials.SSHPrivateKey` - Undocumented
- `twisted.cred.credentials.UsernameHashedPassword` - Undocumented
- `twisted.cred.credentials.UsernamePassword` - Undocumented
  - `twisted.mail._cred.LOGINCredentials` - Undocumented
    - `twisted.mail.smtp.LOGINCredentials` - `LOGINCredentials` generates challenges for LOGIN authentication.
  - `twisted.mail._cred.PLAINCredentials` - Undocumented
- `twisted.cred.portal.Portal` - A mediator between clients and a realm.
- `twisted.cred.strcred.AuthOptionMixin` - Defines helper methods that can be added on to any `usage.Options` subclass that needs authentication.
  - `twisted.conch.tap.Options` - No class docstring; 0/1 instance variable, 0/4 class variable, 1/2 method documented
  - `twisted.mail.tap.Options` - An options list parser for twistd mail.
  - `twisted.tap.ftp.Options` - No class docstring; 0/4 class variable, 1/2 method documented
  - `twisted.words.tap.Options` - No class docstring; 0/5 class variable, 2/3 methods documented
- `twisted.enterprise.adbapi.Connection` - A wrapper for a DB-API connection instance.
- `twisted.enterprise.adbapi.ConnectionPool` - Represent a pool of connections to a DB-API 2.0 compliant database.
- `twisted.enterprise.adbapi.Transaction` - A lightweight wrapper for a DB-API 'cursor' object.
- `twisted.internet._baseprocess.BaseProcess` - No class docstring; 0/3 instance variable, 0/1 class variable, 2/4 methods documented
  - `twisted.internet._dumbwin32proc.Process` - A process that integrates with the Twisted event loop.
  - `twisted.internet.process._BaseProcess` - Base class for Process and PTYProcess.
    - `twisted.internet.process.Process` - An operating-system Process.
    - `twisted.internet.process.PTYProcess` - An operating-system Process that uses PTY support.
- `twisted.internet._newtls._BypassTLS` - `_BypassTLS` is used as the transport object for the TLS protocol object used to implement `startTLS`. Its methods skip any TLS logic which `startTLS` enables.
- `twisted.internet._newtls.ClientMixin` - A mixin for `twisted.internet.tcp.Client` which just marks it as a client for the purposes of the default TLS handshake.
- `twisted.internet._newtls.ConnectionMixin` - A mixin for `twisted.internet.abstract.FileDescriptor` which adds an `ITLSTransport` implementation.
- `twisted.internet._newtls.ServerMixin` - A mixin for `twisted.internet.tcp.Server` which just marks it as a server for the purposes of the default TLS handshake.
- `twisted.internet._pollingfile._PollableResource` - Undocumented
  - `twisted.internet._dumbwin32proc._Reaper` - Undocumented
  - `twisted.internet._pollingfile._PollableReadPipe` - Undocumented
  - `twisted.internet._pollingfile._PollableWritePipe` - No class docstring; 0/7 instance variable, 4/10 methods documented
- `twisted.internet._pollingfile._PollingTimer` - Undocumented
  - `twisted.internet._dumbwin32proc.Process` - A process that integrates with the Twisted event loop.
  - `twisted.internet.stdio.StandardIO` - No class docstring; 0/5 instance variable, 0/1 class variable, 1/15 method documented
- `twisted.internet._producer_helpers._PullToPush` - An adapter that converts a non-streaming to a streaming producer.
- `twisted.internet._resolver.ComplexResolverSimplifier` - A converter from `IHostnameResolver` to `IResolverSimple`
- `twisted.internet._resolver.FirstOneWins` - An `IResolutionReceiver` which fires a `Deferred` with its first result.
- `twisted.internet._resolver.GAIResolver` - `IHostnameResolver` implementation that resolves hostnames by calling `getaddrinfo` in a thread.
- `twisted.internet._resolver.HostResolution` - The in-progress resolution of a given hostname.
- `twisted.internet._resolver.SimpleResolverComplexifier` - A converter from `IResolverSimple` to `IHostnameResolver`.
- `twisted.internet._sslverify._ChooseDiffieHellmanEllipticCurve` - Chooses the best elliptic curve for Elliptic Curve Diffie-Hellman key exchange, and provides a `configureECDHCurve` method to set the curve, when appropriate, on a new `OpenSSL.SSL.Context`.
- `twisted.internet._sslverify.CertBase` - Base class for public (certificate only) and private (certificate + key pair) certificates.
  - `twisted.internet.ssl.Certificate` - An x509 certificate.
    - `twisted.internet.ssl.PrivateCertificate` - An x509 certificate and private key.
  - `twisted.internet.ssl.CertificateRequest` - An x509 certificate request.
- `twisted.internet._sslverify.ClientTLSOptions` - Client creator for TLS.
- `twisted.internet._sslverify.OpenSSLCertificateAuthorities` - Trust an explicitly specified set of certificates, represented by a list of `OpenSSL.crypto.X509` objects.
- `twisted.internet._sslverify.OpenSSLCipher` - A representation of an OpenSSL cipher.
- `twisted.internet._sslverify.PublicKey` - A `PublicKey` is a representation of the public part of a key pair.
  - `twisted.internet.ssl.KeyPair` - No class docstring; 3/10 methods, 0/2 class method documented
- `twisted.internet.abstract._ConsumerMixin` - `IConsumer` implementations can mix this in to get `registerProducer` and `unregisterProducer` methods which take care of keeping track of a producer's state.
  - `twisted.internet.abstract.FileDescriptor` - An object which can be operated on by select().
    - `twisted.internet.base.BasePort` - Basic implementation of a ListeningPort.
      - `twisted.internet.tcp.Port` - A TCP server port, listening for connections.
        - `twisted.internet.ssl.Port` - I am an SSL port.
        - `twisted.internet.unix.Port` - No class docstring; 0/7 instance variable, 2/6 methods, 1/1 class method documented
      - `twisted.internet.udp.Port` - UDP port, listening for packets.
        - `twisted.internet.udp.MulticastPort` - UDP Port that supports multicasting.
        - `twisted.internet.unix.DatagramPort` - Datagram UNIX port, listening for packets.
          - `twisted.internet.unix.ConnectedDatagramPort` - A connected datagram UNIX socket.
    - `twisted.internet.inotify.INotify` - The INotify file descriptor, it basically does everything related to INotify, from reading to notifying watch points.
    - `twisted.internet.process.ProcessReader` - ProcessReader
    - `twisted.internet.process.ProcessWriter` - (Internal) Helper class to write into a Process's input pipe.
    - `twisted.internet.process.PTYProcess` - An operating-system Process that uses PTY support.
    - `twisted.internet.serialport.SerialPort` - A serial device, acting as a transport, that uses a win32 event.
    - `twisted.internet.serialport.SerialPort` - A select()able serial device, acting as a transport.
    - `twisted.internet.tcp.Connection` - Superclass of all socket-based FileDescriptors.
      - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
        - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
          - `twisted.internet.ssl.Client` - I am an SSL client.
        - `twisted.internet.unix.Client` - A client for Unix sockets.
      - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
        - `twisted.internet.ssl.Server` - I am an SSL server.
        - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
    - `twisted.pair.tuntap.TuntapPort` - A Port that reads and writes packets from/to a TUN/TAP-device.
  - `twisted.internet.iocpreactor.abstract.FileHandle` - File handle that can read and write asynchronously
    - `twisted.internet.iocpreactor.tcp.Connection` -
      - `twisted.internet.iocpreactor.tcp.Client` -
      - `twisted.internet.iocpreactor.tcp.Server` - Serverside socket-stream connection class.
    - `twisted.internet.iocpreactor.udp.Port` - UDP port, listening for packets.
      - `twisted.internet.iocpreactor.udp.MulticastPort` - UDP Port that supports multicasting.
- `twisted.internet.abstract._LogOwner` - Mixin to help implement `interfaces.ILoggingContext` for transports which have a protocol, the log prefix of which should also appear in the transport's log prefix.
  - `twisted.internet.abstract.FileDescriptor` - An object which can be operated on by select().
    - `twisted.internet.base.BasePort` - Basic implementation of a ListeningPort.
      - `twisted.internet.tcp.Port` - A TCP server port, listening for connections.
        - `twisted.internet.ssl.Port` - I am an SSL port.
        - `twisted.internet.unix.Port` - No class docstring; 0/7 instance variable, 2/6 methods, 1/1 class method documented
      - `twisted.internet.udp.Port` - UDP port, listening for packets.
        - `twisted.internet.udp.MulticastPort` - UDP Port that supports multicasting.
        - `twisted.internet.unix.DatagramPort` - Datagram UNIX port, listening for packets.
          - `twisted.internet.unix.ConnectedDatagramPort` - A connected datagram UNIX socket.
    - `twisted.internet.inotify.INotify` - The INotify file descriptor, it basically does everything related to INotify, from reading to notifying watch points.
    - `twisted.internet.process.ProcessReader` - ProcessReader
    - `twisted.internet.process.ProcessWriter` - (Internal) Helper class to write into a Process's input pipe.
    - `twisted.internet.process.PTYProcess` - An operating-system Process that uses PTY support.
    - `twisted.internet.serialport.SerialPort` - A serial device, acting as a transport, that uses a win32 event.
    - `twisted.internet.serialport.SerialPort` - A select()able serial device, acting as a transport.
    - `twisted.internet.tcp.Connection` - Superclass of all socket-based FileDescriptors.
      - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
        - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
          - `twisted.internet.ssl.Client` - I am an SSL client.
        - `twisted.internet.unix.Client` - A client for Unix sockets.
      - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
        - `twisted.internet.ssl.Server` - I am an SSL server.
        - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
    - `twisted.pair.tuntap.TuntapPort` - A Port that reads and writes packets from/to a TUN/TAP-device.
  - `twisted.internet.iocpreactor.abstract.FileHandle` - File handle that can read and write asynchronously
    - `twisted.internet.iocpreactor.tcp.Connection` -
      - `twisted.internet.iocpreactor.tcp.Client` -
      - `twisted.internet.iocpreactor.tcp.Server` - Serverside socket-stream connection class.
    - `twisted.internet.iocpreactor.udp.Port` - UDP port, listening for packets.
      - `twisted.internet.iocpreactor.udp.MulticastPort` - UDP Port that supports multicasting.
  - `twisted.internet.iocpreactor.tcp.Port` - No class docstring; 0/16 instance variable, 0/1 class variable, 5/11 methods documented
- `twisted.internet.address._ProcessAddress` - An `interfaces.IAddress` provider for process transports.
- `twisted.internet.address.HostnameAddress` - A `HostnameAddress` represents the address of a `HostnameEndpoint`.
- `twisted.internet.address.IPv4Address` - An `IPv4Address` represents the address of an IPv4 socket endpoint.
  - `twisted.internet.address._ServerFactoryIPv4Address` - Backwards compatibility hack. Just like IPv4Address in practice.
- `twisted.internet.address.IPv6Address` - An `IPv6Address` represents the address of an IPv6 socket endpoint.
- `twisted.internet.address.UNIXAddress` - Object representing a UNIX socket endpoint.
- `twisted.internet.base._SignalReactorMixin` - Private mixin to manage signals: it installs signal handlers at start time, and define run method.
  - `twisted.internet.iocpreactor.reactor.IOCPReactor` - No class docstring; 0/2 instance variable, 8/17 methods documented
  - `twisted.internet.posixbase.PosixReactorBase` - A basis for reactors that use file descriptors.
    - `twisted.internet._glibbase.GlibReactorBase` - Base class for GObject event loop reactors.
      - `twisted.internet.gireactor.GIReactor` - GObject-introspection event loop reactor.
        - `twisted.internet.gtk3reactor.Gtk3Reactor` - A reactor using the gtk3+ event loop.
      - `twisted.internet.gtk2reactor.Gtk2Reactor` - PyGTK+ 2 event loop reactor.
        - `twisted.internet.glib2reactor.Glib2Reactor` - The reactor using the glib mainloop.
    - `twisted.internet._threadedselect.ThreadedSelectReactor` - A threaded select() based reactor - runs on all POSIX platforms and on Win32.
      - `twisted.internet.wxreactor.WxReactor` - wxPython reactor.
    - `twisted.internet.asyncioreactor.AsyncioSelectorReactor` - Reactor running on top of `asyncio.SelectorEventLoop`.
    - `twisted.internet.cfreactor.CFReactor` - The CoreFoundation reactor.
    - `twisted.internet.epollreactor.EPollReactor` - A reactor that uses epoll(7).
    - `twisted.internet.kqreactor.KQueueReactor` - A reactor that uses kqueue(2)/kevent(2) and relies on Python 2.6 or higher which has built in support for kqueue in the select module.
    - `twisted.internet.pollreactor.PollReactor` - A reactor that uses poll(2).
    - `twisted.internet.selectreactor.SelectReactor` - A select() based reactor - runs on all POSIX platforms and on Win32.
      - `twisted.internet._glibbase.PortableGlibReactorBase` - Base class for GObject event loop reactors that works on Windows.
        - `twisted.internet.gireactor.PortableGIReactor` - Portable GObject Introspection event loop reactor.
          - `twisted.internet.gtk3reactor.PortableGtk3Reactor` - Portable GTK+ 3.x reactor.
        - `twisted.internet.gtk2reactor.PortableGtkReactor` - Reactor that works on Windows.
    - `twisted.internet.win32eventreactor.Win32Reactor` - Reactor that uses Win32 event APIs.
- `twisted.internet.base._ThreePhaseEvent` - Collection of callables (with arguments) which can be invoked as a group in a particular order.
- `twisted.internet.base.BlockingResolver` - Undocumented
- `twisted.internet.base.DelayedCall` - No class docstring; 0/12 instance variable, 0/1 class variable, 9/10 methods documented
- `twisted.internet.base.PluggableResolverMixin` - A mixin which implements the pluggable resolver reactor interfaces.
  - `twisted.internet.base.ReactorBase` - Default base class for Reactors.
    - `twisted.internet.iocpreactor.reactor.IOCPReactor` - No class docstring; 0/2 instance variable, 8/17 methods documented
    - `twisted.internet.posixbase.PosixReactorBase` - A basis for reactors that use file descriptors.
      - `twisted.internet._glibbase.GlibReactorBase` - Base class for GObject event loop reactors.
        - `twisted.internet.gireactor.GIReactor` - GObject-introspection event loop reactor.
          - `twisted.internet.gtk3reactor.Gtk3Reactor` - A reactor using the gtk3+ event loop.
        - `twisted.internet.gtk2reactor.Gtk2Reactor` - PyGTK+ 2 event loop reactor.
          - `twisted.internet.glib2reactor.Glib2Reactor` - The reactor using the glib mainloop.
      - `twisted.internet._threadedselect.ThreadedSelectReactor` - A threaded select() based reactor - runs on all POSIX platforms and on Win32.
        - `twisted.internet.wxreactor.WxReactor` - wxPython reactor.
      - `twisted.internet.asyncioreactor.AsyncioSelectorReactor` - Reactor running on top of `asyncio.SelectorEventLoop`.
      - `twisted.internet.cfreactor.CFReactor` - The CoreFoundation reactor.
      - `twisted.internet.epollreactor.EPollReactor` - A reactor that uses epoll(7).
      - `twisted.internet.kqreactor.KQueueReactor` - A reactor that uses kqueue(2)/kevent(2) and relies on Python 2.6 or higher which has built in support for kqueue in the select module.
      - `twisted.internet.pollreactor.PollReactor` - A reactor that uses poll(2).
      - `twisted.internet.selectreactor.SelectReactor` - A select() based reactor - runs on all POSIX platforms and on Win32.
        - `twisted.internet._glibbase.PortableGlibReactorBase` - Base class for GObject event loop reactors that works on Windows.
          - `twisted.internet.gireactor.PortableGIReactor` - Portable GObject Introspection event loop reactor.
            - `twisted.internet.gtk3reactor.PortableGtk3Reactor` - Portable GTK+ 3.x reactor.
          - `twisted.internet.gtk2reactor.PortableGtkReactor` - Reactor that works on Windows.
      - `twisted.internet.win32eventreactor.Win32Reactor` - Reactor that uses Win32 event APIs.
- `twisted.internet.base.ThreadedResolver` - No summary
  - `twisted.names.client.ThreadedResolver` - Undocumented
- `twisted.internet.defer._CancellationStatus` - Cancellation status of an `inlineCallbacks` invocation.
- `twisted.internet.defer._NoContext` - Undocumented
- `twisted.internet.defer.DebugInfo` - Deferred debug helper.
- `twisted.internet.defer.waitForDeferred` - See `deferredGenerator`.
- `twisted.internet.endpoints._SimpleHostnameResolver` - An `IHostnameResolver` provider that invokes a provided callable to resolve hostnames.
- `twisted.internet.endpoints._StandardIOParser` - Stream server endpoint string parser for the Standard I/O type.
- `twisted.internet.endpoints._SystemdParser` - Stream server endpoint string parser for the systemd endpoint type.
- `twisted.internet.endpoints._TCP6ServerParser` - Stream server endpoint string parser for the TCP6ServerEndpoint type.
- `twisted.internet.endpoints._TCPServerEndpoint` - A TCP server endpoint interface
  - `twisted.internet.endpoints.TCP4ServerEndpoint` - Implements TCP server endpoint with an IPv4 configuration
  - `twisted.internet.endpoints.TCP6ServerEndpoint` - Implements TCP server endpoint with an IPv6 configuration
- `twisted.internet.endpoints._TLSClientEndpointParser` - Stream client endpoint string parser for `wrapClientTLS` with `HostnameEndpoint`.
- `twisted.internet.endpoints._WrapperEndpoint` - An endpoint that wraps another endpoint.
- `twisted.internet.endpoints._WrapperServerEndpoint` - A server endpoint that wraps another server endpoint.
- `twisted.internet.endpoints.AdoptedStreamServerEndpoint` - An endpoint for listening on a file descriptor initialized outside of Twisted.
- `twisted.internet.endpoints.HostnameEndpoint` - A name-based endpoint that connects to the fastest amongst the resolved host addresses.
- `twisted.internet.endpoints.ProcessEndpoint` - An endpoint for child processes
- `twisted.internet.endpoints.SSL4ClientEndpoint` - SSL secured TCP client endpoint with an IPv4 configuration
- `twisted.internet.endpoints.SSL4ServerEndpoint` - SSL secured TCP server endpoint with an IPv4 configuration.
- `twisted.internet.endpoints.StandardIOEndpoint` - A Standard Input/Output endpoint
- `twisted.internet.endpoints.TCP4ClientEndpoint` - TCP client endpoint with an IPv4 configuration.
- `twisted.internet.endpoints.TCP6ClientEndpoint` - TCP client endpoint with an IPv6 configuration.
- `twisted.internet.endpoints.UNIXClientEndpoint` - UnixSocket client endpoint.
- `twisted.internet.endpoints.UNIXServerEndpoint` - UnixSocket server endpoint.
- `twisted.internet.inotify._Watch` - Watch object that represents a Watch point in the filesystem. The user should let INotify to create these objects
- `twisted.internet.iocpreactor.udp.MulticastMixin` - Implement multicast functionality.
  - `twisted.internet.iocpreactor.udp.MulticastPort` - UDP Port that supports multicasting.
- `twisted.internet.posixbase._DisconnectSelectableMixin` - Mixin providing the `_disconnectSelectable` method.
  - `twisted.internet.posixbase._ContinuousPolling` - Schedule reads and writes based on the passage of time, rather than notification.
  - `twisted.internet.posixbase.PosixReactorBase` - A basis for reactors that use file descriptors.
    - `twisted.internet._glibbase.GlibReactorBase` - Base class for GObject event loop reactors.
      - `twisted.internet.gireactor.GIReactor` - GObject-introspection event loop reactor.
        - `twisted.internet.gtk3reactor.Gtk3Reactor` - A reactor using the gtk3+ event loop.
      - `twisted.internet.gtk2reactor.Gtk2Reactor` - PyGTK+ 2 event loop reactor.
        - `twisted.internet.glib2reactor.Glib2Reactor` - The reactor using the glib mainloop.
    - `twisted.internet._threadedselect.ThreadedSelectReactor` - A threaded select() based reactor - runs on all POSIX platforms and on Win32.
      - `twisted.internet.wxreactor.WxReactor` - wxPython reactor.
    - `twisted.internet.asyncioreactor.AsyncioSelectorReactor` - Reactor running on top of `asyncio.SelectorEventLoop`.
    - `twisted.internet.cfreactor.CFReactor` - The CoreFoundation reactor.
    - `twisted.internet.epollreactor.EPollReactor` - A reactor that uses epoll(7).
    - `twisted.internet.kqreactor.KQueueReactor` - A reactor that uses kqueue(2)/kevent(2) and relies on Python 2.6 or higher which has built in support for kqueue in the select module.
    - `twisted.internet.pollreactor.PollReactor` - A reactor that uses poll(2).
    - `twisted.internet.selectreactor.SelectReactor` - A select() based reactor - runs on all POSIX platforms and on Win32.
      - `twisted.internet._glibbase.PortableGlibReactorBase` - Base class for GObject event loop reactors that works on Windows.
        - `twisted.internet.gireactor.PortableGIReactor` - Portable GObject Introspection event loop reactor.
          - `twisted.internet.gtk3reactor.PortableGtk3Reactor` - Portable GTK+ 3.x reactor.
        - `twisted.internet.gtk2reactor.PortableGtkReactor` - Reactor that works on Windows.
    - `twisted.internet.win32eventreactor.Win32Reactor` - Reactor that uses Win32 event APIs.
- `twisted.internet.posixbase._PollLikeMixin` - Mixin for poll-like reactors.
  - `twisted.internet._glibbase.GlibReactorBase` - Base class for GObject event loop reactors.
    - `twisted.internet.gireactor.GIReactor` - GObject-introspection event loop reactor.
      - `twisted.internet.gtk3reactor.Gtk3Reactor` - A reactor using the gtk3+ event loop.
    - `twisted.internet.gtk2reactor.Gtk2Reactor` - PyGTK+ 2 event loop reactor.
      - `twisted.internet.glib2reactor.Glib2Reactor` - The reactor using the glib mainloop.
  - `twisted.internet.epollreactor.EPollReactor` - A reactor that uses epoll(7).
  - `twisted.internet.pollreactor.PollReactor` - A reactor that uses poll(2).
  - `twisted.internet.posixbase._ContinuousPolling` - Schedule reads and writes based on the passage of time, rather than notification.
- `twisted.internet.posixbase._Waker`
  - `twisted.internet.cfreactor._WakerPlus` - The normal Twisted waker will simply wake up the main loop, which causes an iteration to run, which in turn causes `ReactorBase.runUntilCurrent` to get invoked.
- `twisted.internet.process._FDDetector` - No summary
- `twisted.internet.protocol.AbstractDatagramProtocol` - Abstract protocol for datagram-oriented transports, e.g. IP, ICMP, ARP, UDP.
  - `twisted.internet.protocol.DatagramProtocol` - Protocol for datagram-oriented transport, e.g. UDP.
    - `twisted.internet.protocol.ConnectedDatagramProtocol` - Protocol for connected datagram-oriented transport.
    - `twisted.names.dns.DNSDatagramProtocol` - DNS protocol over UDP.
    - `twisted.protocols.sip.Base` - Base class for SIP clients and servers.
      - `twisted.protocols.sip.Proxy` - SIP proxy.
        - `twisted.protocols.sip.RegisterProxy` - A proxy that allows registration for a specific domain.
  - `twisted.pair.ethernet.EthernetProtocol` - Undocumented
  - `twisted.pair.ip.IPProtocol` - Undocumented
  - `twisted.pair.rawudp.RawUDPProtocol` - Undocumented
- `twisted.internet.protocol.BaseProtocol` - This is the abstract superclass of all protocols.
  - `twisted.internet.protocol.ProcessProtocol` - Base process protocol implementation which does simple dispatching for stdin, stdout, and stderr file descriptors.
    - `twisted.conch.ssh.session._ProtocolWrapper` - This class wraps a `Protocol` instance in a `ProcessProtocol` instance.
    - `twisted.conch.ssh.session.SSHSessionProcessProtocol` - I am both an `IProcessProtocol` and an `ITransport`.
    - `twisted.conch.stdio.TerminalProcessProtocol` - No class docstring; 0/2 instance variable, 3/7 methods documented
    - `twisted.internet.endpoints._WrapIProtocol` - An `IProcessProtocol` provider that wraps an `IProtocol`.
    - `twisted.internet.utils._BackRelay` - Trivial protocol for communicating with a process and turning its output into the result of a `Deferred`.
    - `twisted.internet.utils._EverythingGetter` - Undocumented
    - `twisted.internet.utils._ValueGetter` - Undocumented
    - `twisted.mail.alias.ProcessAliasProtocol` - A process protocol which errbacks a deferred when the associated process ends.
    - `twisted.runner.procmon.LoggingProtocol` - Undocumented
    - `twisted.trial._dist.worker.LocalWorker` - Local process worker protocol. This worker runs as a local process and communicates via stdin/out.
    - `twisted.web.twcgi.CGIProcessProtocol` - No class docstring; 0/5 instance variable, 0/2 class variable, 2/12 methods documented
  - `twisted.internet.protocol.Protocol` - This is the base class for streaming connection-oriented protocols.
    - `twisted.conch.client.agent.SSHAgentForwardingLocal` - Undocumented
    - `twisted.conch.insults.helper.TerminalBuffer` - An in-memory terminal emulator.
      - `twisted.conch.insults.helper.ExpectableBuffer` - Undocumented
    - `twisted.conch.insults.insults.ClientProtocol` - No class docstring; 0/6 instance variable, 0/5 class variable, 2/6 methods, 0/1 class documented
    - `twisted.conch.insults.insults.ServerProtocol` - No class docstring; 0/10 instance variable, 0/4 class variable, 0/2 constant, 1/55 method, 0/1 class documented
    - `twisted.conch.ssh.agent.SSHAgentClient` - The client side of the SSH agent protocol. This is equivalent to ssh-add(1) and can be used with either ssh-agent(1) or the SSHAgentServer protocol, also in this package.
      - `twisted.conch.client.agent.SSHAgentClient` - No class docstring; 0/1 instance variable, 0/1 class variable, 1/4 method documented
    - `twisted.conch.ssh.agent.SSHAgentServer` - The server side of the SSH agent protocol. This is equivalent to ssh-agent(1) and can be used with either ssh-add(1) or the SSHAgentClient protocol, also in this package.
    - `twisted.conch.ssh.filetransfer.FileTransferBase` - No class docstring; 0/3 instance variable, 0/3 class variable, 1/6 method documented
      - `twisted.conch.ssh.filetransfer.FileTransferClient` - No class docstring; 0/4 instance variable, 17/27 methods documented
      - `twisted.conch.ssh.filetransfer.FileTransferServer` - No class docstring; 0/4 instance variable, 2/35 methods documented
    - `twisted.conch.ssh.forwarding.SSHForwardingClient` - Undocumented
    - `twisted.conch.ssh.session.SSHSessionClient` - Undocumented
    - `twisted.conch.ssh.transport.SSHTransportBase` - Protocol supporting basic SSH functionality: sending/receiving packets and message dispatch. To connect to or run a server, you must use SSHClientTransport or SSHServerTransport.
      - `twisted.conch.ssh.transport.SSHClientTransport` - SSHClientTransport implements the client side of the SSH protocol.
        - `twisted.conch.client.direct.SSHClientTransport` - Undocumented
        - `twisted.conch.endpoints._CommandTransport` - `_CommandTransport` is an SSH client transport which includes a host key verification step before it will proceed to secure the connection.
        - `twisted.conch.scripts.tkconch.SSHClientTransport` - Undocumented
      - `twisted.conch.ssh.transport.SSHServerTransport` - SSHServerTransport implements the server side of the SSH protocol.
    - `twisted.conch.telnet.Telnet` - No summary
      - `twisted.conch.telnet.TelnetTransport` -
    - `twisted.conch.telnet.TelnetProtocol` - Undocumented
      - `twisted.conch.telnet.StatefulTelnetProtocol` - Undocumented
        - `twisted.conch.telnet.AuthenticatingTelnetProtocol` - A protocol which prompts for credentials and attempts to authenticate them.
      - `twisted.conch.telnet.TelnetBootstrapProtocol` - Undocumented
    - `twisted.internet.endpoints._WrappingProtocol` - Wrap another protocol in order to notify my user when a connection has been made.
    - `twisted.internet.tcp._HasClose` - Undocumented
    - `twisted.internet.testing.AccumulatingProtocol` - `AccumulatingProtocol` is an `IProtocol` implementation which collects the data delivered to it and can fire a Deferred when it is connected or disconnected.
    - `twisted.names.dns.DNSProtocol` - DNS protocol over TCP.
    - `twisted.protocols.basic.IntNStringReceiver` - Generic class for length prefixed protocols.
      - `twisted.protocols.basic.Int16StringReceiver` - A receiver for int16-prefixed strings.
        - `twisted.protocols.amp.BinaryBoxProtocol` - A protocol for receiving `AmpBox`es - key/value pairs - via length-prefixed strings. A box is composed of:
          - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
            - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
            - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
      - `twisted.protocols.basic.Int32StringReceiver` - A receiver for int32-prefixed strings.
      - `twisted.protocols.basic.Int8StringReceiver` - A receiver for int8-prefixed strings.
    - `twisted.protocols.basic.LineOnlyReceiver` - A protocol that receives only lines.
      - `twisted.mail.pop3.AdvancedPOP3Client` - A POP3 client protocol.
      - `twisted.mail.pop3.POP3` - A POP3 server protocol.
        - `twisted.mail.protocols.VirtualPOP3` - A virtual hosting POP3 server.
      - `twisted.mail.pop3.POP3Client` - A POP3 client protocol.
      - `twisted.mail.smtp.SMTP` - SMTP server-side protocol.
        - `twisted.mail.smtp.ESMTP` - No class docstring; 0/11 instance variable, 4/12 methods documented
      - `twisted.protocols.ident.IdentClient` - No class docstring; 0/1 instance variable, 0/1 class variable, 1/5 method documented
      - `twisted.protocols.ident.IdentServer` - No summary
    - `twisted.protocols.basic.LineReceiver` - A protocol that receives lines and/or raw data, depending on mode.
      - `twisted.conch.scripts.cftp.StdioClient` - No class docstring; 0/5 instance variable, 0/2 class variable, 8/59 methods documented
      - `twisted.conch.telnet.StatefulTelnetProtocol` - Undocumented
        - `twisted.conch.telnet.AuthenticatingTelnetProtocol` - A protocol which prompts for credentials and attempts to authenticate them.
      - `twisted.internet.testing.LineSendingProtocol` - Undocumented
      - `twisted.mail.imap4.IMAP4Client` - IMAP4 client protocol implementation
      - `twisted.mail.imap4.IMAP4Server` - Protocol implementation for an IMAP4rev1 server.
      - `twisted.mail.smtp.SMTPClient` - SMTP client for sending emails.
        - `twisted.mail.relay.SMTPRelayer` - A base class for SMTP relayers.
          - `twisted.mail.relaymanager.SMTPManagedRelayer` - An SMTP managed relayer.
        - `twisted.mail.smtp.ESMTPClient` - A client for sending emails over ESMTP.
          - `twisted.mail.relay.ESMTPRelayer` - A base class for ESMTP relayers.
            - `twisted.mail.relaymanager.ESMTPManagedRelayer` - An ESMTP managed relayer.
          - `twisted.mail.smtp.ESMTPSender` - Undocumented
        - `twisted.mail.smtp.SMTPSender` - SMTP protocol that sends a single email based on information it gets from its factory, a `SMTPSenderFactory`.
      - `twisted.positioning.nmea.NMEAProtocol` - A protocol that parses and verifies the checksum of an NMEA sentence (in string form, not `NMEASentence`), and delegates to a receiver.
      - `twisted.protocols.dict.DictClient` - dict (RFC2229) client
        - `twisted.protocols.dict.DictLookup` - Utility class for a single dict transaction. To be used with DictLookupFactory
      - `twisted.protocols.finger.Finger` - Undocumented
      - `twisted.protocols.ftp.FTP` - Protocol Interpreter for the File Transfer Protocol
      - `twisted.protocols.ftp.FTPClientBasic` - Foundations of an FTP client.
        - `twisted.protocols.ftp.FTPClient` - `FTPClient` is a client implementation of the FTP protocol which exposes FTP commands as methods which return `Deferred`s.
      - `twisted.protocols.ftp.FTPFileListProtocol` - Parser for standard FTP file listings
      - `twisted.protocols.ftp.FTPOverflowProtocol` - FTP mini-protocol for when there are too many connections.
      - `twisted.protocols.memcache.MemCacheProtocol` - MemCache protocol: connect to a memcached server to store/retrieve values.
      - `twisted.protocols.postfix.PostfixTCPMapServer` - Postfix mail transport agent TCP map protocol implementation.
      - `twisted.protocols.sip.MessagesParser` - A SIP messages parser.
      - `twisted.runner.procmon.LineLogger` - Undocumented
      - `twisted.web._newclient.HTTPParser` - `HTTPParser` handles the parsing side of HTTP processing. With a suitable subclass, it can parse either the client side or the server side of the connection.
        - `twisted.web._newclient.HTTPClientParser` - An HTTP parser which only handles HTTP responses.
      - `twisted.web.http.HTTPChannel` - A receiver for HTTP requests.
        - `twisted.web.proxy.Proxy` - This class implements a simple web proxy.
        - `twisted.web.proxy.ReverseProxy` - Implements a simple reverse proxy.
      - `twisted.web.http.HTTPClient` - A client for HTTP 1.0.
        - `twisted.protocols.shoutcast.ShoutcastClient` - Shoutcast HTTP stream.
        - `twisted.web.proxy.ProxyClient` - Used by ProxyClientFactory to implement a simple web proxy.
        - `twisted.web.xmlrpc.QueryProtocol` - No class docstring; 0/1 instance variable, 2/4 methods documented
      - `twisted.words.protocols.irc.DccChat` - Direct Client Connection protocol type CHAT.
      - `twisted.words.protocols.irc.IRCClient` - Internet Relay Chat client protocol, with sprinkles.
        - `twisted.words.im.ircsupport.IRCProto` - No class docstring; 0/10 instance variable, 2/21 methods documented
    - `twisted.protocols.basic.NetstringReceiver` - A protocol that sends and receives netstrings.
    - `twisted.protocols.ftp.DTP` - No class docstring; 0/4 instance variable, 0/1 class variable, 2/15 methods documented
    - `twisted.protocols.ftp.ProtocolWrapper` - Undocumented
    - `twisted.protocols.ftp.SenderProtocol` - No class docstring; 0/2 instance variable, 2/8 methods documented
    - `twisted.protocols.policies.ProtocolWrapper` - Wraps protocol instances and acts as their transport as well.
      - `twisted.protocols.haproxy._wrapper.HAProxyProtocolWrapper` - A Protocol wrapper that provides HAProxy support.
      - `twisted.protocols.loopback._FireOnClose` - Undocumented
      - `twisted.protocols.policies.SpewingProtocol` - Undocumented
      - `twisted.protocols.policies.ThrottlingProtocol` - Protocol for `ThrottlingFactory`.
      - `twisted.protocols.policies.TimeoutProtocol` - Protocol that automatically disconnects when the connection is idle.
      - `twisted.protocols.policies.TrafficLoggingProtocol` - No class docstring; 0/3 instance variable, 1/9 method documented
      - `twisted.protocols.tls.TLSMemoryBIOProtocol` - No summary
    - `twisted.protocols.portforward.Proxy` - Undocumented
      - `twisted.protocols.portforward.ProxyClient` - Undocumented
      - `twisted.protocols.portforward.ProxyServer` - Undocumented
    - `twisted.protocols.socks.SOCKSv4` - An implementation of the SOCKSv4 protocol.
    - `twisted.protocols.socks.SOCKSv4Incoming` - Undocumented
    - `twisted.protocols.socks.SOCKSv4Outgoing` - Undocumented
    - `twisted.protocols.stateful.StatefulProtocol` - A Protocol that stores state for you.
    - `twisted.protocols.wire.Chargen` - Generate repeating noise (RFC 864).
    - `twisted.protocols.wire.Daytime` - Send back the daytime in ASCII form (RFC 867).
    - `twisted.protocols.wire.Discard` - Discard any received data (RFC 863).
    - `twisted.protocols.wire.Echo` - As soon as any data is received, write it back (RFC 862).
    - `twisted.protocols.wire.QOTD` - Return a quote of the day (RFC 865).
    - `twisted.protocols.wire.Time` - Send back the time in machine readable form (RFC 868).
    - `twisted.protocols.wire.Who` - Return list of active users (RFC 866)
    - `twisted.runner.inetd.InetdProtocol` - Forks a child process on connectionMade, passing the socket as fd 0.
    - `twisted.spread.banana.Banana` - `Banana` implements the Banana s-expression protocol, client and server.
      - `twisted.spread.pb.Broker` - I am a broker for objects.
        - `twisted.mail.pb.MaildirBroker` - Undocumented
        - `twisted.mail.pb.MaildirClient` - Undocumented
    - `twisted.web._http2.H2Connection` - A class representing a single HTTP/2 connection.
    - `twisted.web._newclient.HTTP11ClientProtocol` - `HTTP11ClientProtocol` is an implementation of the HTTP 1.1 client protocol. It supports as few features as possible.
    - `twisted.web.client._ReadBodyProtocol` - Protocol that collects data sent to it.
    - `twisted.web.sux.XMLParser` - No class docstring; 0/23 instance variable, 0/2 class variable, 10/55 methods documented
      - `twisted.web.microdom.MicroDOMParser` - Undocumented
      - `twisted.words.xish.domish.SuxElementStream` - Undocumented
    - `twisted.words.protocols.irc.DccFileReceiveBasic` - Bare protocol to receive a Direct Client Connection SEND stream.
      - `twisted.words.protocols.irc.DccFileReceive` - Higher-level coverage for getting a file from DCC SEND.
    - `twisted.words.protocols.irc.DccSendProtocol` - Protocol for an outgoing Direct Client Connection SEND.
    - `twisted.words.protocols.irc.IRC` - Internet Relay Chat server protocol.
      - `twisted.words.service.IRCUser` - Protocol instance representing an IRC user connected to the server.
    - `twisted.words.xish.xmlstream.XmlStream` - Generic Streaming XML protocol handler.
      - `twisted.words.protocols.jabber.xmlstream.XmlStream` - XMPP XML Stream protocol handler.
- `twisted.internet.protocol.ClientCreator` - Client connections that do not require a factory.
- `twisted.internet.protocol.Factory` - This is a factory which produces protocols.
  - `twisted.conch.ssh.factory.SSHFactory` - A Factory for SSH servers.
    - `twisted.conch.manhole_ssh.ConchFactory` - Undocumented
    - `twisted.conch.openssh_compat.factory.OpenSSHFactory` - No class docstring; 0/2 class variable, 2/3 methods documented
  - `twisted.conch.ssh.forwarding.SSHListenForwardingFactory` - Undocumented
  - `twisted.internet.protocol.ClientFactory` - A Protocol factory for clients.
    - `twisted.conch.client.direct.SSHClientFactory` - Undocumented
    - `twisted.conch.scripts.tkconch.SSHClientFactory` - Undocumented
    - `twisted.internet.endpoints._WrappingFactory` - Wrap a factory in order to wrap the protocols it builds.
    - `twisted.internet.protocol._InstanceFactory` - Factory used by ClientCreator.
    - `twisted.internet.protocol.ReconnectingClientFactory` - Factory which auto-reconnects clients with an exponential back-off.
      - `twisted.words.xish.xmlstream.XmlStreamFactory` - Factory for XmlStream protocol objects as a reconnection client.
        - `twisted.words.protocols.jabber.xmlstream.XmlStreamFactory` - Factory for Jabber XmlStream objects as a reconnecting client.
    - `twisted.mail.relaymanager.SMTPManagedRelayerFactory` - A factory to create an `SMTPManagedRelayer`.
      - `twisted.mail.relaymanager.ESMTPManagedRelayerFactory` - A factory to create an `ESMTPManagedRelayer`.
    - `twisted.mail.smtp.SMTPSenderFactory` - Utility factory for sending emails easily.
      - `twisted.mail.smtp.ESMTPSenderFactory` - Utility factory for sending emails easily.
    - `twisted.names.client.DNSClientFactory` - No class docstring; 0/2 instance variable, 1/4 method documented
    - `twisted.protocols.dict.DictLookupFactory` - Utility factory for a single dict transaction
    - `twisted.protocols.ftp._PassiveConnectionFactory` - Undocumented
    - `twisted.protocols.ftp.DTPFactory` - Client factory for data transfer process protocols.
    - `twisted.protocols.loopback.LoopbackClientFactory` - Undocumented
    - `twisted.protocols.policies.WrappingFactory` - Wraps a factory and its protocols, and keeps track of them.
      - `twisted.protocols.haproxy._wrapper.HAProxyWrappingFactory` - A Factory wrapper that adds PROXY protocol support to connections.
      - `twisted.protocols.policies.LimitConnectionsByPeer` - Undocumented
      - `twisted.protocols.policies.SpewingFactory` - Undocumented
      - `twisted.protocols.policies.ThrottlingFactory` - Throttles bandwidth and number of connections.
      - `twisted.protocols.policies.TimeoutFactory` - Factory for TimeoutWrapper.
      - `twisted.protocols.policies.TrafficLoggingFactory` - No class docstring; 0/3 instance variable, 1/4 method documented
      - `twisted.protocols.tls.TLSMemoryBIOFactory` - `TLSMemoryBIOFactory` adds TLS to connections.
    - `twisted.protocols.portforward.ProxyClientFactory` - Undocumented
    - `twisted.spread.pb.PBClientFactory` - Client factory for PB brokers.
    - `twisted.web.proxy.ProxyClientFactory` - Used by ProxyRequest to implement a simple web proxy.
    - `twisted.web.xmlrpc.QueryFactory` - XML-RPC Client Factory
    - `twisted.words.protocols.irc.DccChatFactory` - Undocumented
  - `twisted.internet.protocol.ServerFactory` - Subclass this to indicate that your protocol.Factory is only usable for servers.
    - `twisted.mail.protocols.POP3Factory` - A POP3 server protocol factory.
    - `twisted.mail.smtp.SMTPFactory` - Factory for SMTP.
      - `twisted.mail.protocols.SMTPFactory` - An SMTP server protocol factory.
        - `twisted.mail.protocols.ESMTPFactory` - An ESMTP server protocol factory.
    - `twisted.names.server.DNSServerFactory` - Server factory and tracker for `DNSProtocol` connections. This class also provides records for responses to DNS queries.
    - `twisted.protocols.ftp.FTPDataPortFactory` - Factory for data connections that use the PORT command
    - `twisted.protocols.policies.LimitTotalConnectionsFactory` - Factory that limits the number of simultaneous connections.
      - `twisted.protocols.ftp.FTPFactory` - A factory for producing ftp protocol instances
    - `twisted.protocols.postfix.PostfixTCPMapDeferringDictServerFactory` - An in-memory dictionary factory for PostfixTCPMapServer.
    - `twisted.protocols.postfix.PostfixTCPMapDictServerFactory` - An in-memory dictionary factory for PostfixTCPMapServer.
    - `twisted.runner.inetd.InetdFactory` - Undocumented
    - `twisted.spread.pb.PBServerFactory` - Server factory for perspective broker.
    - `twisted.web.http.HTTPFactory` - Factory for HTTP server.
      - `twisted.web.server.Site` - A web site: manage log, sessions, and resources.
    - `twisted.words.protocols.jabber.xmlstream.XmlStreamServerFactory` - Factory for Jabber XmlStream objects as a server.
      - `twisted.words.protocols.jabber.component.XMPPComponentServerFactory` - XMPP Component Server factory.
    - `twisted.words.service.IRCFactory` - IRC server that creates instances of the `IRCUser` protocol.
  - `twisted.protocols.portforward.ProxyFactory` - Factory for port forwarder.
  - `twisted.protocols.socks.SOCKSv4Factory` - A factory for a SOCKSv4 proxy.
  - `twisted.protocols.socks.SOCKSv4IncomingFactory` - A utility class for building protocols for incoming connections.
  - `twisted.web.client._HTTP11ClientFactory` - A factory for `HTTP11ClientProtocol`, used by `HTTPConnectionPool`.
  - `twisted.words.protocols.irc.DccSendFactory` - Undocumented
- `twisted.internet.protocol.FileWrapper` - A wrapper around a file-like object to make it behave as a Transport.
- `twisted.internet.serialport.BaseSerialPort` - Base class for Windows and POSIX serial ports.
  - `twisted.internet.serialport.SerialPort` - A serial device, acting as a transport, that uses a win32 event.
  - `twisted.internet.serialport.SerialPort` - A select()able serial device, acting as a transport.
- `twisted.internet.ssl.AcceptableCiphers` - A representation of ciphers that are acceptable for TLS connections.
- `twisted.internet.ssl.CertificateOptions` - A `CertificateOptions` specifies the security properties for a client or server TLS connection used with OpenSSL.
- `twisted.internet.ssl.ClientContextFactory` - A context factory for SSL clients.
- `twisted.internet.ssl.ContextFactory` - A factory for SSL context objects, for server SSL connections.
  - `twisted.internet.ssl.DefaultOpenSSLContextFactory` - `DefaultOpenSSLContextFactory` is a factory for server-side SSL context objects. These objects define certain parameters related to SSL handshakes and the subsequent connection.
- `twisted.internet.ssl.DiffieHellmanParameters` - A representation of key generation parameters that are required for Diffie-Hellman key exchange.
- `twisted.internet.ssl.OpenSSLDefaultPaths` - Trust the set of default verify paths that OpenSSL was built with, as specified by SSL_CTX_set_default_verify_paths.
- `twisted.internet.stdio.PipeAddress` - Undocumented
- `twisted.internet.stdio.StandardIO` - No class docstring; 0/5 instance variable, 2/21 methods documented
- `twisted.internet.task._Timer` - Undocumented
- `twisted.internet.task.Clock` - Provide a deterministic, easily-controlled implementation of `IReactorTime.callLater`. This is commonly useful for writing deterministic unit tests for code which schedules events using this API.
  - `twisted.internet.testing.MemoryReactorClock` - Undocumented
- `twisted.internet.task.CooperativeTask` - A `CooperativeTask` is a task object inside a `Cooperator`, which can be paused, resumed, and stopped. It can also have its completion (or termination) monitored.
- `twisted.internet.task.Cooperator` - Cooperative task scheduler.
- `twisted.internet.task.LoopingCall` - Call a function repeatedly.
- `twisted.internet.tcp._AbortingMixin` - Common implementation of `abortConnection`.
  - `twisted.internet.iocpreactor.tcp.Connection` -
    - `twisted.internet.iocpreactor.tcp.Client` -
    - `twisted.internet.iocpreactor.tcp.Server` - Serverside socket-stream connection class.
  - `twisted.internet.tcp.Connection` - Superclass of all socket-based FileDescriptors.
    - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
      - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
        - `twisted.internet.ssl.Client` - I am an SSL client.
      - `twisted.internet.unix.Client` - A client for Unix sockets.
    - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
      - `twisted.internet.ssl.Server` - I am an SSL server.
      - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
- `twisted.internet.tcp._BaseBaseClient` - Code shared with other (non-POSIX) reactors for management of general outgoing connections.
  - `twisted.internet.iocpreactor.tcp.Client` -
  - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
    - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
      - `twisted.internet.ssl.Client` - I am an SSL client.
    - `twisted.internet.unix.Client` - A client for Unix sockets.
- `twisted.internet.tcp._BaseTCPClient` - Code shared with other (non-POSIX) reactors for management of outgoing TCP connections (both TCPv4 and TCPv6).
  - `twisted.internet.iocpreactor.tcp.Client` -
  - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
    - `twisted.internet.ssl.Client` - I am an SSL client.
- `twisted.internet.tcp._BuffersLogs` - A context manager that buffers any log events until after its block exits.
- `twisted.internet.tcp._FileDescriptorReservation` - `_IFileDescriptorReservation` implementation.
- `twisted.internet.tcp._NullFileDescriptorReservation` - A null implementation of `_IFileDescriptorReservation`.
- `twisted.internet.tcp._SocketCloser` -
  - `twisted.internet.iocpreactor.tcp.Connection` -
    - `twisted.internet.iocpreactor.tcp.Client` -
    - `twisted.internet.iocpreactor.tcp.Server` - Serverside socket-stream connection class.
  - `twisted.internet.iocpreactor.tcp.Port` - No class docstring; 0/16 instance variable, 0/1 class variable, 5/11 methods documented
  - `twisted.internet.tcp.Connection` - Superclass of all socket-based FileDescriptors.
    - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
      - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
        - `twisted.internet.ssl.Client` - I am an SSL client.
      - `twisted.internet.unix.Client` - A client for Unix sockets.
    - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
      - `twisted.internet.ssl.Server` - I am an SSL server.
      - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
  - `twisted.internet.tcp.Port` - A TCP server port, listening for connections.
    - `twisted.internet.ssl.Port` - I am an SSL port.
    - `twisted.internet.unix.Port` - No class docstring; 0/7 instance variable, 2/6 methods, 1/1 class method documented
- `twisted.internet.tcp._TLSClientMixin` - Undocumented
  - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
    - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
      - `twisted.internet.ssl.Client` - I am an SSL client.
    - `twisted.internet.unix.Client` - A client for Unix sockets.
- `twisted.internet.tcp._TLSConnectionMixin` - Undocumented
  - `twisted.internet.tcp.Connection` - Superclass of all socket-based FileDescriptors.
    - `twisted.internet.tcp.BaseClient` - A base class for client TCP (and similar) sockets.
      - `twisted.internet.tcp.Client` - A transport for a TCP protocol; either TCPv4 or TCPv6.
        - `twisted.internet.ssl.Client` - I am an SSL client.
      - `twisted.internet.unix.Client` - A client for Unix sockets.
    - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
      - `twisted.internet.ssl.Server` - I am an SSL server.
      - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
- `twisted.internet.tcp._TLSServerMixin` - Undocumented
  - `twisted.internet.tcp.Server` - Serverside socket-stream connection class.
    - `twisted.internet.ssl.Server` - I am an SSL server.
    - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
- `twisted.internet.testing._FakeConnector` - A fake `IConnector` that allows us to inspect if it has been told to stop connecting.
- `twisted.internet.testing._FakePort` - A fake `IListeningPort` to be used in tests.
- `twisted.internet.testing.FakeDatagramTransport` - Undocumented
- `twisted.internet.testing.MemoryReactor` - A fake reactor to be used in tests. This reactor doesn't actually do much that's useful yet. It accepts TCP connection setup attempts, but they will never succeed.
  - `twisted.internet.testing.MemoryReactorClock` - Undocumented
- `twisted.internet.testing.NonStreamingProducer` - A pull producer which writes 10 times only.
- `twisted.internet.testing.RaisingMemoryReactor` - A fake reactor to be used in tests. It accepts TCP connection setup attempts, but they will fail.
- `twisted.internet.testing.StringTransport` - A transport implementation which buffers data in memory and keeps track of its other state without providing any behavior.
  - `twisted.internet.testing.StringTransportWithDisconnection` - A `StringTransport` which on disconnection will trigger the connection lost on the attached protocol.
- `twisted.internet.udp.MulticastMixin` - Implement multicast functionality.
  - `twisted.internet.udp.MulticastPort` - UDP Port that supports multicasting.
- `twisted.internet.unix._SendmsgMixin` - Mixin for stream-oriented UNIX transports which uses sendmsg and recvmsg to offer additional functionality, such as copying file descriptors into other processes.
  - `twisted.internet.unix.Client` - A client for Unix sockets.
  - `twisted.internet.unix.Server` - No class docstring; 0/2 instance variable, 0/3 method, 1/1 class method documented
- `twisted.internet.unix._UNIXPort` - No class docstring; 1/1 method documented
  - `twisted.internet.unix.DatagramPort` - Datagram UNIX port, listening for packets.
    - `twisted.internet.unix.ConnectedDatagramPort` - A connected datagram UNIX socket.
  - `twisted.internet.unix.Port` - No class docstring; 0/7 instance variable, 2/6 methods, 1/1 class method documented
- `twisted.internet.unix._UnsupportedSendmsgMixin` - Behaviorless placeholder used when `twisted.python.sendmsg` is not available, preventing `IUNIXTransport` from being supported.
- `twisted.internet.win32eventreactor._ThreadedWin32EventsMixin` - This mixin implements `IReactorWin32Events` for another reactor by running a `Win32Reactor` in a separate thread and dispatching work to it.
  - `twisted.internet.iocpreactor.reactor.IOCPReactor` - No class docstring; 0/2 instance variable, 8/17 methods documented
  - `twisted.internet.selectreactor.SelectReactor` - A select() based reactor - runs on all POSIX platforms and on Win32.
    - `twisted.internet._glibbase.PortableGlibReactorBase` - Base class for GObject event loop reactors that works on Windows.
      - `twisted.internet.gireactor.PortableGIReactor` - Portable GObject Introspection event loop reactor.
        - `twisted.internet.gtk3reactor.PortableGtk3Reactor` - Portable GTK+ 3.x reactor.
      - `twisted.internet.gtk2reactor.PortableGtkReactor` - Reactor that works on Windows.
- `twisted.internet.win32eventreactor._ThreadFDWrapper` - This wraps an event handler and translates notification in the helper `Win32Reactor` thread into a notification in the primary reactor thread.
- `twisted.internet.wxsupport.wxRunner` - Make sure GUI events are handled.
- `twisted.logger._flatten.KeyFlattener` - A `KeyFlattener` computes keys for the things within curly braces in PEP-3101-style format strings as parsed by `string.Formatter.parse`.
- `twisted.logger._stdlib.StringifiableFromEvent` - An object that implements `__str__()` in order to defer the work of formatting until it's converted into a `str`.
- `twisted.logger.FileLogObserver` - Log observer that writes to a file-like object.
- `twisted.logger.FilteringLogObserver` - `ILogObserver` that wraps another `ILogObserver`, but filters out events based on applying a series of `ILogFilterPredicate`s.
- `twisted.logger.LegacyLogObserverWrapper` - `ILogObserver` that wraps a `twisted.python.log.ILogObserver`.
- `twisted.logger.LimitedHistoryLogObserver` - `ILogObserver` that stores events in a buffer of a fixed size:
- `twisted.logger.LogBeginner` - No summary
- `twisted.logger.Logger` - A `Logger` emits log messages to an observer. You should instantiate it as a class or module attribute, as documented in `this module's documentation`.
- `twisted.logger.LoggingFile` - File-like object that turns `write()` calls into logging events.
- `twisted.logger.LogLevelFilterPredicate` - `ILogFilterPredicate` that filters out events with a log level lower than the log level for the event's namespace.
- `twisted.logger.LogPublisher` - ILogObserver that fans out events to other observers.
- `twisted.logger.STDLibLogObserver` - Log observer that writes to the python standard library's `logging` module.
- `twisted.mail._cred.CramMD5ClientAuthenticator` - Undocumented
- `twisted.mail._cred.LOGINAuthenticator` - Undocumented
- `twisted.mail._cred.PLAINAuthenticator` - Undocumented
- `twisted.mail._pop3client._ListSetter` - A utility class to construct a list from a multi-line response accounting for deleted messages.
- `twisted.mail.alias.AliasBase` - The default base class for aliases.
  - `twisted.mail.alias.AddressAlias` - An alias which translates one email address into another.
  - `twisted.mail.alias.AliasGroup` - An alias which points to multiple destination aliases.
  - `twisted.mail.alias.FileAlias` - An alias which translates an address to a file.
  - `twisted.mail.alias.ProcessAlias` - An alias which is handled by the execution of a program.
- `twisted.mail.alias.FileWrapper` - A message receiver which delivers a message to a file.
- `twisted.mail.alias.MessageWrapper` - A message receiver which delivers a message to a child process.
- `twisted.mail.alias.MultiWrapper` - A message receiver which delivers a single message to multiple other message receivers.
- `twisted.mail.imap4._FetchParser` - Undocumented
- `twisted.mail.imap4._FetchParser.Body` - Undocumented
- `twisted.mail.imap4._FetchParser.BodyStructure` - Undocumented
- `twisted.mail.imap4._FetchParser.Envelope` - Undocumented
- `twisted.mail.imap4._FetchParser.Flags` - Undocumented
- `twisted.mail.imap4._FetchParser.Header` - Undocumented
- `twisted.mail.imap4._FetchParser.InternalDate` - Undocumented
- `twisted.mail.imap4._FetchParser.MIME` - Undocumented
- `twisted.mail.imap4._FetchParser.RFC822` - Undocumented
- `twisted.mail.imap4._FetchParser.RFC822Header` - Undocumented
- `twisted.mail.imap4._FetchParser.RFC822Size` - Undocumented
- `twisted.mail.imap4._FetchParser.RFC822Text` - Undocumented
- `twisted.mail.imap4._FetchParser.Text` - Undocumented
- `twisted.mail.imap4._FetchParser.UID` - Undocumented
- `twisted.mail.imap4._MessageStructure` - `_MessageStructure` is a helper base class for message structure classes representing the structure of particular kinds of messages, as defined by their MIME type.
  - `twisted.mail.imap4._MultipartMessageStructure` - `_MultipartMessageStructure` represents the message structure of a multipart/* message.
  - `twisted.mail.imap4._SinglepartMessageStructure` - `_SinglepartMessageStructure` represents the message structure of a non-multipart/* message.
    - `twisted.mail.imap4._RFC822MessageStructure` - `_RFC822MessageStructure` represents the message structure of a message/rfc822 message.
    - `twisted.mail.imap4._TextMessageStructure` - `_TextMessageStructure` represents the message structure of a text/* message.
- `twisted.mail.imap4.Command` - Undocumented
- `twisted.mail.imap4.DontQuoteMe` - Undocumented
- `twisted.mail.imap4.FileProducer` - No class docstring; 0/5 instance variable, 0/1 constant, 2/6 methods documented
- `twisted.mail.imap4.LiteralFile` - No class docstring; 0/3 instance variable, 0/1 class variable, 1/3 method documented
- `twisted.mail.imap4.LiteralString` - No class docstring; 0/3 instance variable, 1/3 method documented
- `twisted.mail.imap4.MemoryAccountWithoutNamespaces` - Undocumented
  - `twisted.mail.imap4.MemoryAccount` - Undocumented
- `twisted.mail.imap4.MessageProducer` - No class docstring; 0/5 instance variable, 0/1 class variable, 0/1 constant, 1/3 method documented
- `twisted.mail.imap4.MessageSet` - A set of message identifiers usable by both `IMAP4Client` and `IMAP4Server` via `IMailboxIMAP.store` and `IMailboxIMAP.fetch`.
- `twisted.mail.imap4.WriteBuffer` - Buffer up a bunch of writes before sending them all to a transport at once.
- `twisted.mail.mail.BounceDomain` - A domain with no users.
- `twisted.mail.mail.DomainWithDefaultDict` - A simulated dictionary for mapping domain names to domain objects with a default value for non-existing keys.
- `twisted.mail.mail.FileMessage` - A message receiver which delivers a message to a file.
  - `twisted.mail.maildir.MaildirMessage` - A message receiver which adds a header and delivers a message to a file whose name includes the size of the message.
- `twisted.mail.maildir._MaildirMailboxAppendMessageTask` - A task which adds a message to a maildir mailbox.
- `twisted.mail.maildir._MaildirNameGenerator` - A utility class to generate a unique maildir name.
- `twisted.mail.maildir.AbstractMaildirDomain` - An abstract maildir-backed domain.
  - `twisted.mail.maildir.MaildirDirdbmDomain` - A maildir-backed domain where membership is checked with a `DirDBM` database.
- `twisted.mail.maildir.DirdbmDatabase` - A credentials checker which authenticates users out of a `DirDBM` database.
- `twisted.mail.maildir.StringListMailbox` - An in-memory mailbox.
- `twisted.mail.pop3._HeadersPlusNLines` - A utility class to retrieve the header and some lines of the body of a mail message.
- `twisted.mail.pop3._IteratorBuffer` - An iterator which buffers the elements of a container and periodically passes them as input to a writer.
- `twisted.mail.pop3.APOPCredentials` - Credentials for use in APOP authentication.
- `twisted.mail.pop3.Mailbox` - A base class for mailboxes.
  - `twisted.mail.maildir.MaildirMailbox` - A maildir-backed mailbox.
- `twisted.mail.protocols.DomainDeliveryBase` - A base class for message delivery using the domains of a mail service.
  - `twisted.mail.protocols.ESMTPDomainDelivery` - A domain delivery base class for use in an ESMTP server.
  - `twisted.mail.protocols.SMTPDomainDelivery` - A domain delivery base class for use in an SMTP server.
- `twisted.mail.relay.DomainQueuer` - An SMTP domain which add messages to a queue intended for relaying.
- `twisted.mail.relay.RelayerMixin` - No class docstring; 0/2 instance variable, 1/5 method documented
  - `twisted.mail.relay.ESMTPRelayer` - A base class for ESMTP relayers.
    - `twisted.mail.relaymanager.ESMTPManagedRelayer` - An ESMTP managed relayer.
  - `twisted.mail.relay.SMTPRelayer` - A base class for SMTP relayers.
    - `twisted.mail.relaymanager.SMTPManagedRelayer` - An SMTP managed relayer.
- `twisted.mail.relaymanager._AttemptManager` - A manager for an attempt to relay a set of messages to a mail exchange server.
- `twisted.mail.relaymanager.ManagedRelayerMixin` - SMTP Relayer which notifies a manager
  - `twisted.mail.relaymanager.ESMTPManagedRelayer` - An ESMTP managed relayer.
  - `twisted.mail.relaymanager.SMTPManagedRelayer` - An SMTP managed relayer.
- `twisted.mail.relaymanager.MXCalculator` - A utility for looking up mail exchange hosts and tracking whether they are working or not.
- `twisted.mail.relaymanager.Queue` - A queue for messages to be relayed.
- `twisted.mail.relaymanager.SmartHostSMTPRelayingManager` - A smart host which uses SMTP managed relayers to send messages from the relay queue.
  - `twisted.mail.relaymanager.SmartHostESMTPRelayingManager` - A smart host which uses ESMTP managed relayers to send messages from the relay queue.
- `twisted.mail.scripts.mailmail.Configuration` - No summary
- `twisted.mail.scripts.mailmail.Options` - Store the values of the parsed command-line options to the mailmail script.
- `twisted.mail.smtp.Address` - Parse and hold an RFC 2821 address.
- `twisted.mail.smtp.PLAINAuthenticator` - Undocumented
- `twisted.mail.smtp.SenderMixin` - Utility class for sending emails easily.
  - `twisted.mail.smtp.ESMTPSender` - Undocumented
  - `twisted.mail.smtp.SMTPSender` - SMTP protocol that sends a single email based on information it gets from its factory, a `SMTPSenderFactory`.
- `twisted.mail.smtp.User` - Hold information about and SMTP message recipient, including information on where the message came from
- `twisted.mail.tap.AliasUpdater` - A callable object which updates the aliases for a domain from an aliases(5) file.
- `twisted.names.client.AXFRController` - Undocumented
- `twisted.names.common.ResolverBase` - `ResolverBase` is a base class for implementations of `interfaces.IResolver` which deals with a lot of the boilerplate of implementing all of the lookup methods.
  - `twisted.names.authority.FileAuthority` - An Authority that is loaded from a file.
    - `twisted.names.authority.BindAuthority` - An Authority that loads BIND zone files.
    - `twisted.names.authority.PySourceAuthority` - A FileAuthority that is built up from Python source code.
    - `twisted.names.secondary.SecondaryAuthority` - An Authority that keeps itself updated by performing zone transfers.
  - `twisted.names.cache.CacheResolver` - A resolver that serves records from a local, memory cache.
  - `twisted.names.client.Resolver` - No summary
  - `twisted.names.hosts.Resolver` - A resolver that services hosts(5) format files.
  - `twisted.names.resolve.ResolverChain` - Lookup an address using multiple `IResolver`s
  - `twisted.names.root.Resolver` - `Resolver` implements recursive lookup starting from a specified list of root servers.
- `twisted.names.dns._DecodeContext` - Mutable state shared between the `IEncodable` decoders invoked while reading a single DNS message.
- `twisted.names.dns.Charstr` - No class docstring; 0/1 instance variable, 3/6 methods documented
- `twisted.names.dns.DNSMixin` - DNS protocol mixin shared by UDP and TCP implementations.
  - `twisted.names.dns.DNSDatagramProtocol` - DNS protocol over UDP.
  - `twisted.names.dns.DNSProtocol` - DNS protocol over TCP.
- `twisted.names.dns.Name` - A name in the domain name system, made up of multiple labels. For example, twistedmatrix.com.
- `twisted.names.dns.Query` - Represent a single DNS query.
- `twisted.names.resolve.FailureHandler` - Undocumented
- `twisted.names.root._DummyController` - A do-nothing DNS controller. This is useful when all messages received will be responses to previously issued queries. Anything else received will be ignored.
- `twisted.names.root.DeferredResolver` - Undocumented
- `twisted.names.srvconnect._SRVConnector_ClientFactoryWrapper` - Undocumented
- `twisted.names.srvconnect.SRVConnector` - A connector that looks up DNS SRV records.
- `twisted.pair.ethernet.EthernetHeader` - Undocumented
- `twisted.pair.ip.IPHeader` - Undocumented
- `twisted.pair.rawudp.UDPHeader` - Undocumented
- `twisted.pair.testing._FakePort` - A socket-like object which can be used to read UDP datagrams from tunnel-like file descriptors managed by a `MemoryIOSystem`.
- `twisted.pair.testing.MemoryIOSystem` - An in-memory implementation of basic I/O primitives, useful in the context of unit testing as a drop-in replacement for parts of the `os` module.
- `twisted.pair.testing.Tunnel` - An in-memory implementation of a tun or tap device.
- `twisted.pair.tuntap._RealSystem` - An interface to the parts of the operating system which `TuntapPort` relies on. This is most of an implementation of `_IInputOutputSystem`.
- `twisted.persisted.aot._NoStateObj` - Undocumented
- `twisted.persisted.aot.AOTJellier` - No class docstring; 0/3 instance variable, 2/4 methods documented
- `twisted.persisted.aot.AOTUnjellier` - I handle the unjellying of an Abstract Object Tree. See AOTUnjellier.unjellyAO
- `twisted.persisted.aot.Copyreg` - Undocumented
- `twisted.persisted.aot.Deref` - Undocumented
- `twisted.persisted.aot.Instance` - Undocumented
- `twisted.persisted.aot.InstanceMethod` - Undocumented
- `twisted.persisted.aot.Named` - Undocumented
  - `twisted.persisted.aot.Class` - Undocumented
  - `twisted.persisted.aot.Function` - Undocumented
  - `twisted.persisted.aot.Module` - Undocumented
- `twisted.persisted.aot.Ref` - Undocumented
- `twisted.persisted.crefutil._DictKeyAndValue` - Undocumented
- `twisted.persisted.crefutil.NotKnown` - Undocumented
  - `twisted.persisted.crefutil._Container` - Helper class to resolve circular references on container objects.
    - `twisted.persisted.crefutil._Tuple` - Manage tuple containing circular references. Deprecated: use `_Container` instead.
  - `twisted.persisted.crefutil._Defer` - Undocumented
  - `twisted.persisted.crefutil._Dereference` - Undocumented
  - `twisted.persisted.crefutil._InstanceMethod` - Undocumented
- `twisted.persisted.dirdbm.DirDBM` - A directory with a DBM interface.
  - `twisted.persisted.dirdbm.Shelf` - A directory with a DBM shelf interface.
- `twisted.persisted.sob.Persistent` - No class docstring; 0/3 instance variable, 2/6 methods documented
- `twisted.persisted.styles.Ephemeral` - This type of object is never persisted; if possible, even references to it are eliminated.
  - `twisted.persisted.sob._EverythingEphemeral` - No class docstring; 0/1 instance variable, 0/1 class variable, 1/2 method documented
  - `twisted.spread.banana.Banana` - `Banana` implements the Banana s-expression protocol, client and server.
    - `twisted.spread.pb.Broker` - I am a broker for objects.
      - `twisted.mail.pb.MaildirBroker` - Undocumented
      - `twisted.mail.pb.MaildirClient` - Undocumented
  - `twisted.spread.pb.RemoteReference` - A translucent reference to a remote object.
    - `twisted.words.service.AvatarReference` - Undocumented
    - `twisted.words.service.PBGroupReference` - Undocumented
    - `twisted.words.service.PBMindReference` - Undocumented
  - `twisted.words.protocols.irc.DccChat` - Direct Client Connection protocol type CHAT.
  - `twisted.words.protocols.irc.DccFileReceiveBasic` - Bare protocol to receive a Direct Client Connection SEND stream.
    - `twisted.words.protocols.irc.DccFileReceive` - Higher-level coverage for getting a file from DCC SEND.
  - `twisted.words.protocols.irc.DccSendProtocol` - Protocol for an outgoing Direct Client Connection SEND.
- `twisted.persisted.styles.Versioned` - This type of object is persisted with versioning information.
  - `twisted.web.distrib.ResourcePublisher` - `ResourcePublisher` exposes a remote API which can be used to respond to request.
  - `twisted.words.im.basesupport.AbstractAccount` - Base class for Accounts.
    - `twisted.words.im.ircsupport.IRCAccount` - Undocumented
    - `twisted.words.im.pbsupport.PBAccount` - No class docstring; 0/2 instance variable, 0/1 class variable, 2/7 methods documented
- `twisted.plugin.CachedDropin` - A collection of `CachedPlugin` instances from a particular module in a plugin package.
- `twisted.plugin.CachedPlugin` - Undocumented
- `twisted.plugins.cred_anonymous.AnonymousCheckerFactory` - Generates checkers that will authenticate an anonymous request.
- `twisted.plugins.cred_file.FileCheckerFactory` - A factory for instances of `FilePasswordDB`.
- `twisted.plugins.cred_memory.InMemoryCheckerFactory` - A factory for in-memory credentials checkers.
- `twisted.plugins.cred_sshkeys.SSHKeyCheckerFactory` - Generates checkers that will authenticate a SSH public key
- `twisted.plugins.cred_unix.UNIXChecker` - A credentials checker for a UNIX server. This will check that an authenticating username/password is a valid user on the system.
- `twisted.plugins.cred_unix.UNIXCheckerFactory` - A factory for `UNIXChecker`.
- `twisted.plugins.twisted_trial._Reporter` - Undocumented
- `twisted.plugins.twisted_words.PBChatInterface` - Undocumented
- `twisted.plugins.twisted_words.RelayChatInterface` - Undocumented
- `twisted.positioning._sentence._BaseSentence` - A base sentence class for a particular protocol.
  - `twisted.positioning.nmea.NMEASentence` - An object representing an NMEA sentence.
- `twisted.positioning._sentence._PositioningSentenceProducerMixin` - A mixin for certain protocols that produce positioning sentences.
  - `twisted.positioning.nmea.NMEAProtocol` - A protocol that parses and verifies the checksum of an NMEA sentence (in string form, not `NMEASentence`), and delegates to a receiver.
- `twisted.positioning.base.BasePositioningReceiver` - A base positioning receiver.
- `twisted.positioning.base.BeaconInformation` - Information about positioning beacons (a generalized term for the reference objects that help you determine your position, such as satellites or cell towers).
- `twisted.positioning.base.PositioningBeacon` - A positioning beacon.
  - `twisted.positioning.base.Satellite` - A satellite.
- `twisted.positioning.nmea.NMEAAdapter` - An adapter from NMEAProtocol receivers to positioning receivers.
- `twisted.protocols.amp._DescriptorExchanger` - `_DescriptorExchanger` is a mixin for `BinaryBoxProtocol` which adds support for receiving file descriptors, a feature offered by `IUNIXTransport`.
  - `twisted.protocols.amp.BinaryBoxProtocol` - A protocol for receiving `AmpBox`es - key/value pairs - via length-prefixed strings. A box is composed of:
    - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
      - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
      - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
- `twisted.protocols.amp._NoCertificate` - No summary
- `twisted.protocols.amp._ParserHelper` - A box receiver which records all boxes received.
- `twisted.protocols.amp.Argument` - Base-class of all objects that take values from Amp packets and convert them into objects for Python functions.
  - `twisted.protocols.amp.AmpList` - Convert a list of dictionaries into a list of AMP boxes on the wire.
  - `twisted.protocols.amp.Boolean` - Encode True or False as "True" or "False" on the wire.
  - `twisted.protocols.amp.DateTime` - Encodes `datetime.datetime` instances.
  - `twisted.protocols.amp.Decimal` - Encodes `decimal.Decimal` instances.
  - `twisted.protocols.amp.Float` - Encode floating-point values on the wire as their repr.
  - `twisted.protocols.amp.Integer` - Encode any integer values of any size on the wire as the string representation.
    - `twisted.protocols.amp.Descriptor` - Encode and decode file descriptors for exchange over a UNIX domain socket.
  - `twisted.protocols.amp.ListOf` - Encode and decode lists of instances of a single other argument type.
  - `twisted.protocols.amp.String` - Don't do any conversion at all; just pass through 'str'.
    - `twisted.protocols.amp._LocalArgument` - Local arguments are never actually relayed across the wire. This is just a shim so that StartTLS can pretend to have some arguments: if arguments acquire documentation properties, replace this with something nicer later.
    - `twisted.protocols.amp.Unicode` - Encode a unicode string on the wire as UTF-8.
      - `twisted.protocols.amp.Path` - Encode and decode `filepath.FilePath` instances as paths on the wire.
- `twisted.protocols.amp.BoxDispatcher` - A `BoxDispatcher` dispatches '_ask', '_answer', and '_error' `AmpBox`es, both incoming and outgoing, to their appropriate destinations.
  - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
    - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
    - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
- `twisted.protocols.amp.Command` - Subclass me to specify an AMP Command.
  - `twisted.protocols.amp.ProtocolSwitchCommand` - No summary
  - `twisted.protocols.amp.StartTLS` - Use, or subclass, me to implement a command that starts TLS.
  - `twisted.trial._dist.managercommands.AddError` - Add an error.
  - `twisted.trial._dist.managercommands.AddExpectedFailure` - Add an expected failure.
  - `twisted.trial._dist.managercommands.AddFailure` - Add a failure.
  - `twisted.trial._dist.managercommands.AddSkip` - Add a skip.
  - `twisted.trial._dist.managercommands.AddSuccess` - Add a success.
  - `twisted.trial._dist.managercommands.AddUnexpectedSuccess` - Add an unexpected success.
  - `twisted.trial._dist.managercommands.TestWrite` - Write test log.
  - `twisted.trial._dist.workercommands.Run` - Run a test.
  - `twisted.trial._dist.workercommands.Start` - Set up the worker process, giving the running directory.
- `twisted.protocols.amp.CommandLocator` - A `CommandLocator` is a collection of responders to AMP `Command`s, with the help of the `Command.responder` decorator.
  - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
    - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
    - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
- `twisted.protocols.amp.SimpleStringLocator` - Implement the `AMP.locateResponder` method to do simple, string-based dispatch.
  - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
    - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
    - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
- `twisted.protocols.basic._PauseableMixin` - Undocumented
  - `twisted.protocols.basic.IntNStringReceiver` - Generic class for length prefixed protocols.
    - `twisted.protocols.basic.Int16StringReceiver` - A receiver for int16-prefixed strings.
      - `twisted.protocols.amp.BinaryBoxProtocol` - A protocol for receiving `AmpBox`es - key/value pairs - via length-prefixed strings. A box is composed of:
        - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
          - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
          - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
    - `twisted.protocols.basic.Int32StringReceiver` - A receiver for int32-prefixed strings.
    - `twisted.protocols.basic.Int8StringReceiver` - A receiver for int8-prefixed strings.
  - `twisted.protocols.basic.LineReceiver` - A protocol that receives lines and/or raw data, depending on mode.
    - `twisted.conch.scripts.cftp.StdioClient` - No class docstring; 0/5 instance variable, 0/2 class variable, 8/59 methods documented
    - `twisted.conch.telnet.StatefulTelnetProtocol` - Undocumented
      - `twisted.conch.telnet.AuthenticatingTelnetProtocol` - A protocol which prompts for credentials and attempts to authenticate them.
    - `twisted.internet.testing.LineSendingProtocol` - Undocumented
    - `twisted.mail.imap4.IMAP4Client` - IMAP4 client protocol implementation
    - `twisted.mail.imap4.IMAP4Server` - Protocol implementation for an IMAP4rev1 server.
    - `twisted.mail.smtp.SMTPClient` - SMTP client for sending emails.
      - `twisted.mail.relay.SMTPRelayer` - A base class for SMTP relayers.
        - `twisted.mail.relaymanager.SMTPManagedRelayer` - An SMTP managed relayer.
      - `twisted.mail.smtp.ESMTPClient` - A client for sending emails over ESMTP.
        - `twisted.mail.relay.ESMTPRelayer` - A base class for ESMTP relayers.
          - `twisted.mail.relaymanager.ESMTPManagedRelayer` - An ESMTP managed relayer.
        - `twisted.mail.smtp.ESMTPSender` - Undocumented
      - `twisted.mail.smtp.SMTPSender` - SMTP protocol that sends a single email based on information it gets from its factory, a `SMTPSenderFactory`.
    - `twisted.positioning.nmea.NMEAProtocol` - A protocol that parses and verifies the checksum of an NMEA sentence (in string form, not `NMEASentence`), and delegates to a receiver.
    - `twisted.protocols.dict.DictClient` - dict (RFC2229) client
      - `twisted.protocols.dict.DictLookup` - Utility class for a single dict transaction. To be used with DictLookupFactory
    - `twisted.protocols.finger.Finger` - Undocumented
    - `twisted.protocols.ftp.FTP` - Protocol Interpreter for the File Transfer Protocol
    - `twisted.protocols.ftp.FTPClientBasic` - Foundations of an FTP client.
      - `twisted.protocols.ftp.FTPClient` - `FTPClient` is a client implementation of the FTP protocol which exposes FTP commands as methods which return `Deferred`s.
    - `twisted.protocols.ftp.FTPFileListProtocol` - Parser for standard FTP file listings
    - `twisted.protocols.ftp.FTPOverflowProtocol` - FTP mini-protocol for when there are too many connections.
    - `twisted.protocols.memcache.MemCacheProtocol` - MemCache protocol: connect to a memcached server to store/retrieve values.
    - `twisted.protocols.postfix.PostfixTCPMapServer` - Postfix mail transport agent TCP map protocol implementation.
    - `twisted.protocols.sip.MessagesParser` - A SIP messages parser.
    - `twisted.runner.procmon.LineLogger` - Undocumented
    - `twisted.web._newclient.HTTPParser` - `HTTPParser` handles the parsing side of HTTP processing. With a suitable subclass, it can parse either the client side or the server side of the connection.
      - `twisted.web._newclient.HTTPClientParser` - An HTTP parser which only handles HTTP responses.
    - `twisted.web.http.HTTPChannel` - A receiver for HTTP requests.
      - `twisted.web.proxy.Proxy` - This class implements a simple web proxy.
      - `twisted.web.proxy.ReverseProxy` - Implements a simple reverse proxy.
    - `twisted.web.http.HTTPClient` - A client for HTTP 1.0.
      - `twisted.protocols.shoutcast.ShoutcastClient` - Shoutcast HTTP stream.
      - `twisted.web.proxy.ProxyClient` - Used by ProxyClientFactory to implement a simple web proxy.
      - `twisted.web.xmlrpc.QueryProtocol` - No class docstring; 0/1 instance variable, 2/4 methods documented
    - `twisted.words.protocols.irc.DccChat` - Direct Client Connection protocol type CHAT.
    - `twisted.words.protocols.irc.IRCClient` - Internet Relay Chat client protocol, with sprinkles.
      - `twisted.words.im.ircsupport.IRCProto` - No class docstring; 0/10 instance variable, 2/21 methods documented
- `twisted.protocols.basic._RecvdCompatHack` - Emulates the to-be-deprecated `IntNStringReceiver.recvd` attribute.
- `twisted.protocols.basic.FileSender` - A producer that sends the contents of a file to a consumer.
- `twisted.protocols.basic.StatefulStringProtocol` - A stateful string protocol.
  - `twisted.protocols.amp.BinaryBoxProtocol` - A protocol for receiving `AmpBox`es - key/value pairs - via length-prefixed strings. A box is composed of:
    - `twisted.protocols.amp.AMP` - This protocol is an AMP connection. See the module docstring for protocol details.
      - `twisted.trial._dist.worker.LocalWorkerAMP` - Local implementation of the manager commands.
      - `twisted.trial._dist.worker.WorkerProtocol` - The worker-side trial distributed protocol.
- `twisted.protocols.dict.Definition` - A word definition
- `twisted.protocols.ftp._FileReader` - Undocumented
- `twisted.protocols.ftp._FileWriter` - Undocumented
- `twisted.protocols.ftp.ASCIIConsumerWrapper` - Undocumented
- `twisted.protocols.ftp.BaseFTPRealm` - Base class for simple FTP realms which provides an easy hook for specifying the home directory for each user.
  - `twisted.protocols.ftp.FTPRealm` -
  - `twisted.protocols.ftp.SystemFTPRealm` - `SystemFTPRealm` uses system user account information to decide what the home directory for a particular avatarId is.
- `twisted.protocols.ftp.FileConsumer` - A consumer for FTP input that writes data to a file.
- `twisted.protocols.ftp.FTPAnonymousShell` - An anonymous implementation of IFTPShell
  - `twisted.protocols.ftp.FTPShell` - An authenticated implementation of `IFTPShell`.
- `twisted.protocols.ftp.FTPCommand` - Undocumented
- `twisted.protocols.haproxy._info.ProxyInfo` - A data container for parsed PROXY protocol information.
- `twisted.protocols.haproxy._parser.HAProxyServerParser` - Stream server endpoint string parser for the HAProxyServerEndpoint type.
- `twisted.protocols.haproxy._v1parser.V1Parser` - PROXY protocol version one header parser.
- `twisted.protocols.haproxy._v2parser.V2Parser` - PROXY protocol version two header parser.
- `twisted.protocols.htb.Bucket` - Implementation of a Token bucket.
- `twisted.protocols.htb.HierarchicalBucketFilter` - Filter things into buckets that can be nested.
  - `twisted.protocols.htb.FilterByHost` - A Hierarchical Bucket filter with a `Bucket` for each host.
  - `twisted.protocols.htb.FilterByServer` - A Hierarchical Bucket filter with a `Bucket` for each service.
- `twisted.protocols.htb.ShapedProtocolFactory` - Dispense `Protocols` with traffic shaping on their transports.
- `twisted.protocols.ident.ProcServerMixin` - Implements lookup() to grab entries for responses from /proc/net/tcp
- `twisted.protocols.loopback._LoopbackAddress` - Undocumented
- `twisted.protocols.loopback._LoopbackQueue` - Trivial wrapper around a list to give it an interface like a queue, which the addition of also sending notifications by way of a Deferred whenever the list has something added to it.
- `twisted.protocols.loopback._LoopbackTransport` - No class docstring; 0/3 instance variable, 0/1 class variable, 1/10 method documented
- `twisted.protocols.loopback.LoopbackRelay` - Undocumented
- `twisted.protocols.memcache.Command` - Wrap a client action into an object, that holds the values used in the protocol.
- `twisted.protocols.pcp.BasicProducerConsumerProxy` - I can act as a man in the middle between any Producer and Consumer.
  - `twisted.protocols.pcp.ProducerConsumerProxy` - ProducerConsumerProxy with a finite buffer.
    - `twisted.protocols.htb.ShapedConsumer` - Wraps a `Consumer` and shapes the rate at which it receives data.
      - `twisted.protocols.htb.ShapedTransport` - Wraps a `Transport` and shapes the rate at which it receives data.
- `twisted.protocols.policies.TimeoutMixin` - Mixin for protocols which wish to timeout connections.
  - `twisted.mail.imap4.IMAP4Client` - IMAP4 client protocol implementation
  - `twisted.mail.imap4.IMAP4Server` - Protocol implementation for an IMAP4rev1 server.
  - `twisted.mail.pop3.AdvancedPOP3Client` - A POP3 client protocol.
  - `twisted.mail.pop3.POP3` - A POP3 server protocol.
    - `twisted.mail.protocols.VirtualPOP3` - A virtual hosting POP3 server.
  - `twisted.mail.smtp.SMTP` - SMTP server-side protocol.
    - `twisted.mail.smtp.ESMTP` - No class docstring; 0/11 instance variable, 4/12 methods documented
  - `twisted.mail.smtp.SMTPClient` - SMTP client for sending emails.
    - `twisted.mail.relay.SMTPRelayer` - A base class for SMTP relayers.
      - `twisted.mail.relaymanager.SMTPManagedRelayer` - An SMTP managed relayer.
    - `twisted.mail.smtp.ESMTPClient` - A client for sending emails over ESMTP.
      - `twisted.mail.relay.ESMTPRelayer` - A base class for ESMTP relayers.
        - `twisted.mail.relaymanager.ESMTPManagedRelayer` - An ESMTP managed relayer.
      - `twisted.mail.smtp.ESMTPSender` - Undocumented
    - `twisted.mail.smtp.SMTPSender` - SMTP protocol that sends a single email based on information it gets from its factory, a `SMTPSenderFactory`.
  - `twisted.protocols.ftp.FTP` - Protocol Interpreter for the File Transfer Protocol
  - `twisted.protocols.memcache.MemCacheProtocol` - MemCache protocol: connect to a memcached server to store/retrieve values.
  - `twisted.protocols.postfix.PostfixTCPMapServer` - Postfix mail transport agent TCP map protocol implementation.
  - `twisted.web._http2.H2Connection` - A class representing a single HTTP/2 connection.
  - `twisted.web.http.HTTPChannel` - A receiver for HTTP requests.
    - `twisted.web.proxy.Proxy` - This class implements a simple web proxy.
    - `twisted.web.proxy.ReverseProxy` - Implements a simple reverse proxy.
- `twisted.protocols.sip.InMemoryRegistry` - A simplistic registry for a specific domain.
- `twisted.protocols.sip.Message` - A SIP message.
  - `twisted.protocols.sip.Request` - A Request for a URI
  - `twisted.protocols.sip.Response` - A Response to a URI Request
- `twisted.protocols.sip.Registration` - Undocumented
- `twisted.protocols.sip.URL` - A SIP URL.
- `twisted.protocols.sip.Via` - A `Via` is a SIP Via header, representing a segment of the path taken by the request.
- `twisted.protocols.tls._ContextFactoryToConnectionFactory` - Adapter wrapping a `twisted.internet.interfaces.IOpenSSLContextFactory` into a `IOpenSSLClientConnectionCreator` or `IOpenSSLServerConnectionCreator`.
- `twisted.protocols.tls._ProducerMembrane` - Stand-in for producer registered with a `TLSMemoryBIOProtocol` transport.
- `twisted.python._release.APIBuilder` - Generate API documentation from source files using pydoctor. This requires pydoctor to be installed and usable.
- `twisted.python._release.BuildAPIDocsScript` - A thing for building API documentation. See `main`.
- `twisted.python._release.CheckNewsfragmentScript` - A thing for checking whether a checkout has a newsfragment.
- `twisted.python._release.GitCommand` - Subset of Git commands to release Twisted from a Git repository.
- `twisted.python._release.Project` - A representation of a project that has a version.
- `twisted.python._release.SphinxBuilder` - Generate HTML documentation using Sphinx.
- `twisted.python._shellcomp.ZshArgumentsGenerator` - Generate a call to the zsh _arguments completion function based on data in a usage.Options instance
- `twisted.python._shellcomp.ZshBuilder` - Constructs zsh code that will complete options for a given usage.Options instance, possibly including a list of subcommand names.
  - `twisted.python._shellcomp.ZshSubcommandBuilder` - Constructs zsh code that will complete options for a given usage.Options instance, and also for a single sub-command. This will only be used in the case where the user is completing options for a specific subcommand.
- `twisted.python._textattributes._ColorAttribute` - A color text attribute.
- `twisted.python._textattributes.CharacterAttributesMixin` - No summary
  - `twisted.conch.insults.text._CharacterAttributes` - Factory for character attributes, including foreground and background color and non-color attributes such as bold, reverse video and underline.
  - `twisted.words.protocols.irc._CharacterAttributes` - Factory for character attributes, including foreground and background color and non-color attributes such as bold, reverse video and underline.
- `twisted.python.components._ProxiedClassMethod` - A proxied class method.
- `twisted.python.components._ProxyDescriptor` - A descriptor which will proxy attribute access, mutation, and deletion to the `_ProxyDescriptor.originalAttribute` of the object it is being accessed from.
- `twisted.python.components.Adapter` - I am the default implementation of an Adapter for some interface.
  - `twisted.conch.manhole_ssh.TerminalSession` - Undocumented
  - `twisted.conch.manhole_ssh.TerminalUser` - Undocumented
  - `twisted.internet.protocol.ConsumerToProtocolAdapter` - Undocumented
  - `twisted.internet.protocol.ProtocolToConsumerAdapter` - Undocumented
- `twisted.python.components.Componentized` - I am a mixin to allow you to be adapted in various ways persistently.
  - `twisted.python.components.ReprableComponentized` - Undocumented
  - `twisted.web.server.Request` - An HTTP request.
    - `twisted.web.distrib.Request` - A request which was received by a `ResourceSubscription` and sent via PB to a distributed node.
  - `twisted.web.server.Session` - A user's session with a system.
  - `twisted.web.static.Registry` - I am a Componentized object that will be made available to internal Twisted file-based dynamic web content such as .rpy and .epy scripts.
- `twisted.python.components.proxyForInterface(itrial.ITestCase, '_originalTest')`
  - `twisted.trial.unittest.TestDecorator` - Decorator for test cases.
    - `twisted.trial._asyncrunner._ForceGarbageCollectionDecorator` - Forces garbage collection to be run before and after the test. Any errors logged during the post-test collection are added to the test result as errors.
    - `twisted.trial._asyncrunner._PyUnitTestCaseAdapter` - Adapt from pyunit.TestCase to ITestCase.
      - `twisted.trial._asyncrunner._BrokenIDTestCaseAdapter` - Adapter for pyunit-style `TestCase` subclasses that have undesirable id() methods. That is `unittest.FunctionTestCase` and `unittest.DocTestCase`.
- `twisted.python.constants.Names`
  - `twisted.conch.ssh.keys.FingerprintFormats` - Constants representing the supported formats of key fingerprints.
- `twisted.python.context.ContextTracker` - A `ContextTracker` provides a way to pass arbitrary key/value data up and down a call stack without passing them as parameters to the functions on that call stack.
- `twisted.python.context.ThreadedContextTracker` - Undocumented
- `twisted.python.deprecate._DeprecatedAttribute` - Wrapper for deprecated attributes.
- `twisted.python.deprecate._InternalState` - An `_InternalState` is a helper object for a `_ModuleProxy`, so that it can easily access its own attributes, bypassing its logic for delegating to another object that it's proxying for.
- `twisted.python.deprecate._ModuleProxy` - Python module wrapper to hook module-level attribute access.
- `twisted.python.failure._Code` - A fake code object, used by `_Traceback` via `_Frame`.
- `twisted.python.failure._Frame` - A fake frame object, used by `_Traceback`.
- `twisted.python.failure._TracebackFrame` - Fake traceback object which can be passed to functions in the standard library `traceback` module.
- `twisted.python.fakepwd._ShadowRecord` - `_ShadowRecord` holds the shadow user data for a single user in `ShadowDatabase`. It corresponds to `spwd.struct_spwd`. See that class for attribute documentation.
- `twisted.python.fakepwd._UserRecord` - `_UserRecord` holds the user data for a single user in `UserDatabase`. It corresponds to the `passwd` structure from the `pwd` module. See that module for attribute documentation.
- `twisted.python.fakepwd.ShadowDatabase` - `ShadowDatabase` holds a shadow user database in memory and makes it available via the same API as `spwd`.
- `twisted.python.fakepwd.UserDatabase` - `UserDatabase` holds a traditional POSIX user data in memory and makes it available via the same API as `pwd`.
- `twisted.python.filepath.AbstractFilePath` - Abstract implementation of an `IFilePath`; must be completed by a subclass.
  - `twisted.python.filepath.FilePath` - I am a path on the filesystem that only permits 'downwards' access.
    - `twisted.web.static.File` - No summary
    - `twisted.web.twcgi.CGIDirectory` - Undocumented
  - `twisted.python.zippath.ZipPath` - I represent a file or directory contained within a zip file.
    - `twisted.python.zippath.ZipArchive` - I am a `FilePath`-like object which can wrap a zip archive as if it were a directory.
- `twisted.python.formmethod.Argument` - Base class for form arguments.
  - `twisted.python.formmethod.Boolean` - Undocumented
  - `twisted.python.formmethod.Choice` - No summary
    - `twisted.python.formmethod.RadioGroup` - Undocumented
    - `twisted.python.formmethod.Submit` - Submit button or a reasonable facsimile thereof.
  - `twisted.python.formmethod.Date` - A date -- (year, month, day) tuple.
  - `twisted.python.formmethod.File` - Undocumented
  - `twisted.python.formmethod.Flags` - No summary
    - `twisted.python.formmethod.CheckGroup` - Undocumented
  - `twisted.python.formmethod.Float` - Undocumented
  - `twisted.python.formmethod.Integer` - A single integer.
    - `twisted.python.formmethod.IntegerRange` - Undocumented
  - `twisted.python.formmethod.String` - A single string.
    - `twisted.python.formmethod.Hidden` - A string which is not displayed.
    - `twisted.python.formmethod.Password` - A string which should be obscured when input.
    - `twisted.python.formmethod.Text` - A long string.
    - `twisted.python.formmethod.VerifiedPassword` - A string that should be obscured when input and needs verification.
- `twisted.python.formmethod.FormMethod` - A callable object with a signature.
- `twisted.python.formmethod.MethodSignature` - A signature of a callable.
- `twisted.python.formmethod.PresentationHint` - A hint to a particular system.
- `twisted.python.htmlizer.HTMLWriter` - Write the stream of tokens and whitespace from `TokenPrinter`, formating tokens as HTML spans.
  - `twisted.python.htmlizer.SmallerHTMLWriter` - HTMLWriter that doesn't generate spans for some junk.
- `twisted.python.htmlizer.TokenPrinter` - Format a stream of tokens and intermediate whitespace, for pretty-printing.
- `twisted.python.lockfile.FilesystemLock` - A mutex.
  - `twisted.internet.defer.DeferredFilesystemLock` - A `FilesystemLock` that allows for a `Deferred` to be fired when the lock is acquired.
- `twisted.python.log.ILogContext` - Actually, this interface is just a synonym for the dictionary interface, but it serves as a key for the default information in a log.
- `twisted.python.log.Logger` - This represents a class which may 'own' a log. Used by subclassing.
  - `twisted.conch.ssh.channel.SSHChannel` - No summary
    - `twisted.conch.client.agent.SSHAgentForwardingChannel` - Undocumented
    - `twisted.conch.endpoints._CommandChannel` - A `_CommandChannel` executes a command in a session channel and connects its input and output to an `IProtocol` provider.
    - `twisted.conch.scripts.cftp.SSHSession` - Undocumented
    - `twisted.conch.scripts.conch.SSHSession` - Undocumented
    - `twisted.conch.scripts.tkconch.SSHSession` - Undocumented
    - `twisted.conch.ssh.forwarding.SSHConnectForwardingChannel` - Channel used for handling server side forwarding request. It acts as a client for the remote forwarding destination.
      - `twisted.conch.scripts.conch.SSHConnectForwardingChannel` - Undocumented
    - `twisted.conch.ssh.forwarding.SSHListenForwardingChannel` - Undocumented
      - `twisted.conch.ssh.forwarding.SSHListenClientForwardingChannel` - Undocumented
        - `twisted.conch.scripts.conch.SSHListenClientForwardingChannel` - Undocumented
      - `twisted.conch.ssh.forwarding.SSHListenServerForwardingChannel` - Undocumented
    - `twisted.conch.ssh.session.SSHSession` - A generalized implementation of an SSH session.
  - `twisted.internet.posixbase._FDWaker` - The self-pipe trick<http://cr.yp.to/docs/selfpipe.html>, used to wake up the main loop from another thread or a signal handler.
    - `twisted.internet.posixbase._SIGCHLDWaker` - `_SIGCHLDWaker` can wake up a reactor whenever `SIGCHLD` is received.
    - `twisted.internet.posixbase._UnixWaker` - This class provides a simple interface to wake up the event loop.
      - `twisted.internet._glibbase.GlibWaker` - Run scheduled events after waking up.
  - `twisted.internet.posixbase._SocketWaker` - No summary
- `twisted.python.log.LogPublisher` - Class for singleton log message publishing.
- `twisted.python.log.NullFile` - A file-like object that discards everything.
- `twisted.python.log.StdioOnnaStick` - Class that pretends to be stdout/err, and turns writes into log messages.
- `twisted.python.logfile.BaseLogFile` - The base class for a log file that can be rotated.
  - `twisted.python.logfile.DailyLogFile` - A log file that is rotated daily (at or after midnight localtime)
  - `twisted.python.logfile.LogFile` - A log file that can be rotated.
- `twisted.python.logfile.LogReader` - Read from a log file.
- `twisted.python.modules._DefaultMapImpl` - Wrapper for the default importer, i.e. None.
- `twisted.python.modules._ModuleIteratorHelper` - This mixin provides common behavior between python module and path entries, since the mechanism for searching sys.path and __path__ attributes is remarkably similar.
  - `twisted.python.modules.PathEntry` - I am a proxy for a single entry on sys.path.
  - `twisted.python.modules.PythonModule` - Representation of a module which could be imported from sys.path.
- `twisted.python.modules._ZipMapImpl` - IPathImportMapper implementation for zipimport.ZipImporter.
- `twisted.python.modules.PythonAttribute` - I represent a function, class, or other object that is present.
- `twisted.python.modules.PythonPath` - I represent the very top of the Python object-space, the module list in `sys.path` and the modules list in `sys.modules`.
- `twisted.python.monkey.MonkeyPatcher` - Cover up attributes with new objects. Neat for monkey-patching things for unit-testing purposes.
- `twisted.python.randbytes.RandomFactory` - Factory providing `secureRandom` and `insecureRandom` methods.
- `twisted.python.rebuild.Sensitive` - A utility mixin that's sensitive to rebuilds.
- `twisted.python.reflect.QueueMethod` - I represent a method that doesn't exist yet.
- `twisted.python.roots.Collection` - I represent a static collection of entities.
  - `twisted.python.roots.Constrained` - A collection that has constraints on its names and/or entities.
    - `twisted.python.roots.Homogenous` - A homogenous collection of entities.
      - `twisted.web.vhost.VirtualHostCollection` - Wrapper for virtual hosts collection.
    - `twisted.python.roots.Locked` - A collection that can be locked from adding entities.
- `twisted.python.roots.Entity` - I am a terminal object in a hierarchy, with no children.
- `twisted.python.roots.Request` - I am an abstract representation of a request for an entity.
- `twisted.python.runtime.Platform` - Gives us information about the platform we're running on.
- `twisted.python.shortcut.Shortcut` - A shortcut on Win32.
- `twisted.python.syslog.SyslogObserver` - A log observer for logging to syslog.
- `twisted.python.systemd.ListenFDs` - `ListenFDs` provides access to file descriptors inherited from systemd.
- `twisted.python.threadable.DummyLock` - Hack to allow locks to be unpickled on an unthreaded system.
- `twisted.python.threadpool.ThreadPool` - This class (hopefully) generalizes the functionality of a pool of threads to which work can be dispatched.
- `twisted.python.urlpath.URLPath` - A representation of a URL.
- `twisted.python.usage.CoerceParameter` - Utility class that can corce a parameter before storing it.
- `twisted.python.usage.Completer` - A completion "action" - provides completion possibilities for a particular command-line option. For example we might provide the user a fixed list of choices, or files/dirs according to a glob.
  - `twisted.python._shellcomp.SubcommandAction` - Undocumented
  - `twisted.python.usage.CompleteDirs` - Completes directory names
  - `twisted.python.usage.CompleteFiles` - Completes file names based on a glob pattern
  - `twisted.python.usage.CompleteGroups` - Complete system group names
  - `twisted.python.usage.CompleteHostnames` - Complete hostnames
  - `twisted.python.usage.CompleteList` - Completes based on a fixed list of words
  - `twisted.python.usage.CompleteMultiList` - Completes multiple comma-separated items based on a fixed list of words
  - `twisted.python.usage.CompleteNetInterfaces` - Complete network interface names
  - `twisted.python.usage.CompleteUserAtHost` - No summary
  - `twisted.python.usage.CompleteUsernames` - Complete usernames
- `twisted.python.usage.Completions` - Extra metadata for the shell tab-completion system.
- `twisted.python.util._IntervalDifferentialIterator` - Undocumented
- `twisted.python.util.FancyEqMixin` - Mixin that implements `__eq__` and `__ne__`.
  - `twisted.conch.client.knownhosts.HashedEntry` - A `HashedEntry` is a representation of an entry in a known_hosts file where the hostname has been hashed and salted.
  - `twisted.conch.ssh.address.SSHTransportAddress` - Object representing an SSH Transport endpoint.
  - `twisted.names.dns._EDNSMessage` - An EDNS message.
  - `twisted.names.dns._OPTHeader` - An OPT record header.
  - `twisted.names.dns._OPTVariableOption` - A class to represent OPT record variable options.
  - `twisted.names.dns.Message` - `Message` contains all the information represented by a single DNS request or response.
  - `twisted.names.dns.Record_A` - An IPv4 host address.
  - `twisted.names.dns.Record_A6` - An IPv6 address.
  - `twisted.names.dns.Record_AAAA` - An IPv6 host address.
  - `twisted.names.dns.Record_AFSDB` - Map from a domain name to the name of an AFS cell database server.
  - `twisted.names.dns.Record_HINFO` - Host information.
  - `twisted.names.dns.Record_MINFO` - Mailbox or mail list information.
  - `twisted.names.dns.Record_MX` - Mail exchange.
  - `twisted.names.dns.Record_NAPTR` - The location of the server(s) for a specific protocol and domain.
  - `twisted.names.dns.Record_NULL` - A null record.
  - `twisted.names.dns.Record_RP` - The responsible person for a domain.
  - `twisted.names.dns.Record_SOA` - Marks the start of a zone of authority.
  - `twisted.names.dns.Record_SRV` - The location of the server(s) for a specific protocol and domain.
  - `twisted.names.dns.Record_SSHFP` - A record containing the fingerprint of an SSH key.
  - `twisted.names.dns.Record_TSIG` - A transaction signature, encapsulated in a RR, as described in RFC 2845.
  - `twisted.names.dns.Record_TXT` - Freeform text.
    - `twisted.names.dns.Record_SPF` - Structurally, freeform text. Semantically, a policy definition, formatted as defined in rfc 4408.
  - `twisted.names.dns.Record_WKS` - A well known service description.
  - `twisted.names.dns.RRHeader` - A resource record header.
  - `twisted.names.dns.SimpleRecord` - A Resource Record which consists of a single RFC 1035 domain-name.
    - `twisted.names.dns.Record_CNAME` - The canonical name for an alias.
    - `twisted.names.dns.Record_DNAME` - A non-terminal DNS name redirection.
    - `twisted.names.dns.Record_MB` - A mailbox domain name.
    - `twisted.names.dns.Record_MD` - A mail destination.
    - `twisted.names.dns.Record_MF` - A mail forwarder.
    - `twisted.names.dns.Record_MG` - A mail group member.
    - `twisted.names.dns.Record_MR` - A mail rename domain name.
    - `twisted.names.dns.Record_NS` - An authoritative nameserver.
    - `twisted.names.dns.Record_PTR` - A domain name pointer.
  - `twisted.names.dns.UnknownRecord` - Encapsulate the wire data for unknown record types so that they can pass through the system unchanged.
  - `twisted.pair.tuntap.TunnelAddress` - A `TunnelAddress` represents the tunnel to which a `TuntapPort` is bound.
  - `twisted.positioning.base._BaseSpeed` - An object representing the abstract concept of the speed (rate of movement) of a mobile object.
    - `twisted.positioning.base.Climb` - The climb ("vertical speed") of an object.
    - `twisted.positioning.base.Speed` - The speed (rate of movement) of a mobile object.
  - `twisted.positioning.base.Altitude` - An altitude.
  - `twisted.positioning.base.Angle` - An object representing an angle.
    - `twisted.positioning.base.Coordinate` - A coordinate.
    - `twisted.positioning.base.Heading` - The heading of a mobile object.
  - `twisted.positioning.base.PositionError` - Position error information.
  - `twisted.python._textattributes._Attribute` - A text attribute.
    - `twisted.python._textattributes._ColorAttr` - Generic color attribute.
      - `twisted.python._textattributes._BackgroundColorAttr` - Background color attribute.
      - `twisted.python._textattributes._ForegroundColorAttr` - Foreground color attribute.
    - `twisted.python._textattributes._NormalAttr` - A text attribute for normal text.
    - `twisted.python._textattributes._OtherAttr` - A text attribute for text with formatting attributes.
  - `twisted.python._textattributes.DefaultFormattingState` - A character attribute that does nothing, thus applying no attributes to text.
    - `twisted.python._textattributes._FormattingStateMixin` - Mixin for the formatting state/attributes of a single character.
      - `twisted.conch.insults.helper._FormattingState` - Represents the formatting state/attributes of a single character.
      - `twisted.words.protocols.irc._FormattingState` - Formatting state/attributes of a single character.
  - `twisted.python.filepath.Permissions` - A class representing read/write/execute permissions. Instantiate with any portion of the file's mode that includes the permission bits.
  - `twisted.python.filepath.RWX` - A class representing read/write/execute permissions for a single user category (i.e. user/owner, group, or other/world). Instantiate with three boolean values: readable? writable? executable?.
- `twisted.python.util.FancyStrMixin` - Mixin providing a flexible implementation of `__str__`.
  - `twisted.names._rfc1982.SerialNumber` - An RFC1982 Serial Number.
  - `twisted.names.dns._OPTHeader` - An OPT record header.
  - `twisted.names.dns._OPTVariableOption` - A class to represent OPT record variable options.
  - `twisted.names.dns.Record_A6` - An IPv6 address.
  - `twisted.names.dns.Record_AAAA` - An IPv6 host address.
  - `twisted.names.dns.Record_AFSDB` - Map from a domain name to the name of an AFS cell database server.
  - `twisted.names.dns.Record_HINFO` - Host information.
  - `twisted.names.dns.Record_MINFO` - Mailbox or mail list information.
  - `twisted.names.dns.Record_MX` - Mail exchange.
  - `twisted.names.dns.Record_NAPTR` - The location of the server(s) for a specific protocol and domain.
  - `twisted.names.dns.Record_NULL` - A null record.
  - `twisted.names.dns.Record_RP` - The responsible person for a domain.
  - `twisted.names.dns.Record_SOA` - Marks the start of a zone of authority.
  - `twisted.names.dns.Record_SRV` - The location of the server(s) for a specific protocol and domain.
  - `twisted.names.dns.Record_SSHFP` - A record containing the fingerprint of an SSH key.
  - `twisted.names.dns.Record_TSIG` - A transaction signature, encapsulated in a RR, as described in RFC 2845.
  - `twisted.names.dns.Record_TXT` - Freeform text.
    - `twisted.names.dns.Record_SPF` - Structurally, freeform text. Semantically, a policy definition, formatted as defined in rfc 4408.
  - `twisted.names.dns.Record_WKS` - A well known service description.
  - `twisted.names.dns.SimpleRecord` - A Resource Record which consists of a single RFC 1035 domain-name.
    - `twisted.names.dns.Record_CNAME` - The canonical name for an alias.
    - `twisted.names.dns.Record_DNAME` - A non-terminal DNS name redirection.
    - `twisted.names.dns.Record_MB` - A mailbox domain name.
    - `twisted.names.dns.Record_MD` - A mail destination.
    - `twisted.names.dns.Record_MF` - A mail forwarder.
    - `twisted.names.dns.Record_MG` - A mail group member.
    - `twisted.names.dns.Record_MR` - A mail rename domain name.
    - `twisted.names.dns.Record_NS` - An authoritative nameserver.
    - `twisted.names.dns.Record_PTR` - A domain name pointer.
  - `twisted.names.dns.UnknownRecord` - Encapsulate the wire data for unknown record types so that they can pass through the system unchanged.
  - `twisted.pair.tuntap.TunnelAddress` - A `TunnelAddress` represents the tunnel to which a `TuntapPort` is bound.
- `twisted.python.util.IntervalDifferential` - Given a list of intervals, generate the amount of time to sleep between "instants".
- `twisted.python.util.LineLog` - A limited-size line-based log, useful for logging line-based protocols such as SMTP.
- `twisted.python.win32._ErrorFormatter` - Formatter for Windows error messages.
- `twisted.python.zipstream._FileEntry` - Abstract superclass of both compressed and uncompressed variants of file-like objects within a zip archive.
  - `twisted.python.zipstream.DeflatedZipFileEntry` - File-like object used to read a deflated entry in a ZipFile
  - `twisted.python.zipstream.ZipFileEntry` - File-like object used to read an uncompressed entry in a ZipFile
- `twisted.runner.inetdconf.InetdService` - A simple description of an inetd service.
- `twisted.runner.inetdconf.SimpleConfFile` - Simple configuration file parser superclass.
  - `twisted.runner.inetdconf.InetdConf` - Configuration parser for a traditional UNIX inetd(8)
  - `twisted.runner.inetdconf.ServicesConf` - /etc/services parser
- `twisted.runner.procmon._Process` - The parameters of a process to be restarted.
- `twisted.runner.procmon.DummyTransport` - Undocumented
- `twisted.scripts.trial._BasicOptions` - Basic options shared between trial and its local workers.
  - `twisted.scripts.trial.Options` - Options to the trial command line tool.
  - `twisted.trial._dist.options.WorkerOptions` - Options forwarded to the trial distributed worker.
- `twisted.spread.flavors.RemoteCacheMethod` - A method on a reference to a `RemoteCache`.
- `twisted.spread.jelly._Jellier` - (Internal) This class manages state for a call to jelly()
- `twisted.spread.jelly._Unjellier` - No class docstring; 0/5 instance variable, 8/29 methods documented
- `twisted.spread.jelly.DummySecurityOptions` - DummySecurityOptions() -> insecure security options Dummy security options -- this class will allow anything.
- `twisted.spread.jelly.Jellyable` - Inherit from me to Jelly yourself directly with the `getStateFor' convenience method.
  - `twisted.spread.pb.Serializable` - An object that can be passed remotely.
    - `twisted.spread.pb.Copyable` - Subclass me to get copied each time you are returned from or passed to a remote method.
      - `twisted.spread.pb.Cacheable` - A cached instance.
        - `twisted.spread.publish.Publishable` - An object whose cached state persists across sessions.
      - `twisted.spread.pb.CopyableFailure` - A `flavors.RemoteCopy` and `flavors.Copyable` version of `twisted.python.failure.Failure` for serialization.
      - `twisted.web.server.Request` - An HTTP request.
        - `twisted.web.distrib.Request` - A request which was received by a `ResourceSubscription` and sent via PB to a distributed node.
    - `twisted.spread.pb.Referenceable` - No class docstring; 1/1 class variable, 2/2 methods documented
      - `twisted.mail.pb.Maildir` - Undocumented
      - `twisted.mail.pb.MaildirCollection` - Undocumented
      - `twisted.spread.pb._PortalAuthChallenger` - Called with response to password challenge.
      - `twisted.spread.pb._PortalWrapper` - Root Referenceable object, used to login to portal.
      - `twisted.spread.pb.AsReferenceable` - A reference directed towards another object.
      - `twisted.spread.pb.Root` - I provide a root object to `pb.Broker`s for a `pb.PBClientFactory` or `pb.PBServerFactory`.
        - `twisted.web.distrib.ResourcePublisher` - `ResourcePublisher` exposes a remote API which can be used to respond to request.
      - `twisted.spread.pb.ViewPoint` - I act as an indirect reference to an object accessed through a `pb.IPerspective`.
      - `twisted.spread.util.CallbackPageCollector` - I receive pages from the peer. You may instantiate a Pager with a remote reference to me. I will call the callback with a list of pages once they are all received.
      - `twisted.web.distrib._ReferenceableProducerWrapper` - Undocumented
      - `twisted.words.im.pbsupport.TwistedWordsClient` - In some cases, this acts as an Account, since it a source of text messages (multiple Words instances may be on a single PB connection)
      - `twisted.words.service.ChatAvatar` - Undocumented
      - `twisted.words.service.PBGroup` - Undocumented
      - `twisted.words.service.PBMind` - Undocumented
      - `twisted.words.service.PBUser` - Undocumented
    - `twisted.spread.pb.RemoteCache` - A cache is a local representation of a remote `Cacheable` object.
      - `twisted.spread.publish.RemotePublished` - The local representation of remote Publishable object.
    - `twisted.spread.pb.RemoteReference` - A translucent reference to a remote object.
      - `twisted.words.service.AvatarReference` - Undocumented
      - `twisted.words.service.PBGroupReference` - Undocumented
      - `twisted.words.service.PBMindReference` - Undocumented
    - `twisted.spread.pb.Viewable` - I will be converted to a `ViewPoint` when passed to or returned from a remote method.
      - `twisted.web.twcgi.CGIProcessProtocol` - No class docstring; 0/5 instance variable, 0/2 class variable, 2/12 methods documented
- `twisted.spread.jelly.SecurityOptions` - This will by default disallow everything, except for 'none'.
- `twisted.spread.jelly.Unjellyable` - Inherit from me to Unjelly yourself directly with the `setStateFor` convenience method.
  - `twisted.spread.pb.RemoteCopy` - I am a remote copy of a Copyable object.
    - `twisted.spread.pb.CopiedFailure` - A `CopiedFailure` is a `pb.RemoteCopy` of a `failure.Failure` transferred via PB.
    - `twisted.spread.pb.RemoteCache` - A cache is a local representation of a remote `Cacheable` object.
      - `twisted.spread.publish.RemotePublished` - The local representation of remote Publishable object.
    - `twisted.web.distrib.Request` - A request which was received by a `ResourceSubscription` and sent via PB to a distributed node.
- `twisted.spread.jelly.Unpersistable` - This is an instance of a class that comes back when something couldn't be unpersisted.
- `twisted.spread.pb._JellyableAvatarMixin` - Helper class for code which deals with avatars which PB must be capable of sending to a peer.
  - `twisted.spread.pb._PortalAuthChallenger` - Called with response to password challenge.
  - `twisted.spread.pb._PortalWrapper` - Root Referenceable object, used to login to portal.
- `twisted.spread.pb._PortalRoot` - Root object, used to login to portal.
- `twisted.spread.pb.Avatar` - A default IPerspective implementor.
- `twisted.spread.pb.Local` - (internal) A reference to a local object.
- `twisted.spread.pb.RemoteCacheObserver` - I am a reverse-reference to the peer's `RemoteCache`.
- `twisted.spread.pb.RemoteMethod` - This is a translucent reference to a remote message.
- `twisted.spread.util.LocalAsRemote` - A class useful for emulating the effects of remote behavior locally.
- `twisted.spread.util.LocalAsyncForwarder` - A class useful for forwarding a locally-defined interface.
- `twisted.spread.util.LocalMethod` - Undocumented
- `twisted.spread.util.Pager` - I am an object which pages out information.
  - `twisted.spread.util.FilePager` - Reads a file in chunks and sends the chunks as they come.
  - `twisted.spread.util.StringPager` - A simple pager that splits a string into chunks.
- `twisted.trial._dist.disttrial.DistTrialRunner` - A specialized runner for distributed trial. The runner launches a number of local worker processes which will run tests.
- `twisted.trial._dist.worker.LocalWorkerAddress` - A `IAddress` implementation meant to provide stub addresses for `ITransport.getPeer` and `ITransport.getHost`.
- `twisted.trial._dist.worker.LocalWorkerTransport` - A stub transport implementation used to support `AMP` over a `ProcessProtocol` transport.
- `twisted.trial._dist.workertrial.WorkerLogObserver` - A log observer that forward its output to a `AMP` protocol.
- `twisted.trial._synctest._AssertRaisesContext` - A helper for implementing `assertRaises`. This is a context manager and a helper method to support the non-context manager version of `assertRaises`.
- `twisted.trial._synctest._LogObserver` - Observes the Twisted logs and catches any errors.
- `twisted.trial._synctest._Warning` - No summary
- `twisted.trial.reporter._AnsiColorizer` - A colorizer is an object that loosely wraps around a stream, allowing callers to write text to the stream in a particular color.
- `twisted.trial.reporter._NullColorizer` - See _AnsiColorizer docstring.
- `twisted.trial.reporter._Win32Colorizer` - See _AnsiColorizer docstring.
- `twisted.trial.reporter.SafeStream` - Wraps a stream object so that all `write` calls are wrapped in `untilConcludes`.
- `twisted.trial.reporter.SubunitReporter` - Reports test output via Subunit.
- `twisted.trial.runner.TestHolder` - Placeholder for a `TestCase` inside a reporter. As far as a `TestResult` is concerned, this looks exactly like a unit test.
  - `twisted.trial.runner.ErrorHolder` - No summary
- `twisted.trial.runner.TestLoader` - I find tests inside function, modules, files -- whatever -- then return them wrapped inside a Test (either a `TestSuite` or a `TestCase`).
- `twisted.trial.runner.TrialRunner` - A specialised runner that the trial front end uses.
- `twisted.trial.unittest.PyUnitResultAdapter` - No summary
- `twisted.trial.unittest.Todo` - No summary
- `twisted.trial.util._Janitor` - The guy that cleans up after you.
- `twisted.web._auth.wrapper.UnauthorizedResource` - Simple IResource to escape Resource dispatch
- `twisted.web._element.Element` - Base for classes which can render part of a page.
  - `twisted.web.util._FrameElement` - `_FrameElement` is an `IRenderable` which can render details about one frame from a `Failure`.
  - `twisted.web.util._SourceFragmentElement` - `_SourceFragmentElement` is an `IRenderable` which can render several lines of source code near the line number of a particular frame object.
  - `twisted.web.util._SourceLineElement` - `_SourceLineElement` is an `IRenderable` which can render a single line of source code.
  - `twisted.web.util._StackElement` - `_StackElement` renders an `IRenderable` which can render a list of frames.
  - `twisted.web.util.FailureElement` - `FailureElement` is an `IRenderable` which can render detailed information about a `Failure`.
- `twisted.web._element.Expose` - Helper for exposing methods for various uses using a simple decorator-style callable.
- `twisted.web._http2.H2Stream` - A class representing a single HTTP/2 stream.
- `twisted.web._newclient.ChunkedEncoder` - Helper object which exposes `IConsumer` on top of `HTTP11ClientProtocol` for streaming request bodies to the server.
- `twisted.web._newclient.LengthEnforcingConsumer` - An `IConsumer` proxy which enforces an exact length requirement on the total data written to it.
- `twisted.web._newclient.Request` - A `Request` instance describes an HTTP request to be sent to an HTTP server.
- `twisted.web._newclient.TransportProxyProducer` - An `twisted.internet.interfaces.IPushProducer` implementation which wraps another such thing and proxies calls to it until it is told to stop.
- `twisted.web._stan.CDATA` - A `<![CDATA[]]>` block from a template. Given a separate representation in the DOM so that they may be round-tripped through rendering without losing information.
- `twisted.web._stan.Comment` - A `<!-- -->` comment from a template. Given a separate representation in the DOM so that they may be round-tripped through rendering without losing information.
- `twisted.web._stan.slot` - Marker for markup insertion in a template.
- `twisted.web._stan.Tag` - No summary
- `twisted.web._template_util._NSContext` - A mapping from XML namespaces onto their prefixes in the document.
- `twisted.web._template_util._TagFactory` - A factory for `Tag` objects; the implementation of the `tags` object.
- `twisted.web.client._AgentBase` - Base class offering common facilities for `Agent`-type classes.
  - `twisted.web.client.Agent` - `Agent` is a very basic HTTP client. It supports HTTP and HTTPS scheme URIs.
  - `twisted.web.client.ProxyAgent` - An HTTP agent able to cross HTTP proxies.
- `twisted.web.client._ContextFactoryWithContext` - A `_ContextFactoryWithContext` is like a `twisted.internet.ssl.ContextFactory` with a pre-created context.
- `twisted.web.client._DeprecatedToCurrentPolicyForHTTPS` - Adapt a web context factory to a normal context factory.
- `twisted.web.client._FakeUrllib2Request` - A fake `urllib2.Request` object for `cookielib` to work with.
- `twisted.web.client._FakeUrllib2Response` - A fake `urllib2.Response` object for `cookielib` to work with.
- `twisted.web.client._RetryingHTTP11ClientProtocol` - A wrapper for `HTTP11ClientProtocol` that automatically retries requests.
- `twisted.web.client._StandardEndpointFactory` - Standard HTTP endpoint destinations - TCP for HTTP, TCP+TLS for HTTPS.
- `twisted.web.client.BrowserLikePolicyForHTTPS` - SSL connection creator for web clients.
- `twisted.web.client.ContentDecoderAgent` - An `Agent` wrapper to handle encoded content.
- `twisted.web.client.CookieAgent` - `CookieAgent` extends the basic `Agent` to add RFC-compliant handling of HTTP cookies. Cookies are written to and extracted from a `cookielib.CookieJar` instance.
- `twisted.web.client.FileBodyProducer` - `FileBodyProducer` produces bytes from an input file object incrementally and writes them to a consumer.
- `twisted.web.client.HostnameCachingHTTPSPolicy` - IPolicyForHTTPS that wraps a `IPolicyForHTTPS` and caches the created `IOpenSSLClientConnectionCreator`.
- `twisted.web.client.HTTPConnectionPool` - A pool of persistent HTTP connections.
- `twisted.web.client.RedirectAgent` - An `Agent` wrapper which handles HTTP redirects.
  - `twisted.web.client.BrowserLikeRedirectAgent` - An `Agent` wrapper which handles HTTP redirects in the same fashion as web browsers.
- `twisted.web.client.Response` - A `Response` instance describes an HTTP response received from an HTTP server.
- `twisted.web.client.URI` - A URI object.
- `twisted.web.client.WebClientContextFactory` - This class is deprecated. Please simply use `Agent` as-is, or if you want to customize something, use `BrowserLikePolicyForHTTPS`.
- `twisted.web.distrib.Issue` - Undocumented
- `twisted.web.guard.BasicCredentialFactory` - Credential Factory for HTTP Basic Authentication
- `twisted.web.guard.DigestCredentialFactory` - Wrapper for `digest.DigestCredentialFactory` that implements the `ICredentialFactory` interface.
- `twisted.web.guard.HTTPAuthSessionWrapper` - Wrap a portal, enforcing supported header-based authentication schemes.
- `twisted.web.http._ChunkedTransferDecoder` - No summary
- `twisted.web.http._IdentityTransferDecoder` - Protocol for accumulating bytes up to a specified length. This handles the case where no Transfer-Encoding is specified.
- `twisted.web.http._NoPushProducer` - A no-op version of `interfaces.IPushProducer`, used to abstract over the possibility that a `HTTPChannel` transport does not provide `IPushProducer`.
- `twisted.web.http._XForwardedForAddress` - `IAddress` which represents the client IP to log for a request, as gleaned from an X-Forwarded-For header.
- `twisted.web.http.Request` - A HTTP request.
  - `twisted.web.proxy.ProxyRequest` - Used by Proxy to implement a simple web proxy.
  - `twisted.web.proxy.ReverseProxyRequest` - Used by ReverseProxy to implement a simple reverse proxy.
  - `twisted.web.server.Request` - An HTTP request.
    - `twisted.web.distrib.Request` - A request which was received by a `ResourceSubscription` and sent via PB to a distributed node.
- `twisted.web.http.StringTransport` - I am a BytesIO wrapper that conforms for the transport API. I support the `writeSequence' method.
- `twisted.web.http_headers.Headers` - Stores HTTP headers in a key and multiple value format.
- `twisted.web.microdom.lmx` - Easy creation of XML.
- `twisted.web.microdom.Node` - No class docstring; 0/2 instance variable, 0/1 class variable, 5/14 methods documented
  - `twisted.web.microdom.CharacterData` - Undocumented
    - `twisted.web.microdom._Attr` - Support class for getAttributeNode.
    - `twisted.web.microdom.CDATASection` - Undocumented
    - `twisted.web.microdom.Comment` - A comment node.
    - `twisted.web.microdom.Text` - No class docstring; 0/1 instance variable, 1/5 method documented
      - `twisted.web.domhelpers.RawText` - No summary
  - `twisted.web.microdom.Document` - No class docstring; 0/1 property, 0/1 class variable, 1/10 method documented
  - `twisted.web.microdom.Element` - No class docstring; 0/10 instance variable, 2/17 methods documented
  - `twisted.web.microdom.EntityReference` - Undocumented
- `twisted.web.resource.Resource` - Define a web-accessible resource.
  - `twisted.web.distrib.ResourceSubscription` - No class docstring; 0/5 instance variable, 0/2 class variable, 4/6 methods documented
  - `twisted.web.distrib.UserDirectory` - A resource which lists available user resources and serves them as children.
  - `twisted.web.proxy.ReverseProxyResource` - Resource that renders the results gotten from another server
  - `twisted.web.resource.ErrorPage` - `ErrorPage` is a resource which responds with a particular (parameterized) status and a body consisting of HTML containing some descriptive text. This is useful for rendering simple error pages.
    - `twisted.web.resource.ForbiddenResource` - `ForbiddenResource` is a specialization of `ErrorPage` which returns the FORBIDDEN HTTP response code.
    - `twisted.web.resource.NoResource` - `NoResource` is a specialization of `ErrorPage` which returns the HTTP response code NOT FOUND.
  - `twisted.web.rewrite.RewriterResource` - Undocumented
  - `twisted.web.script.PythonScript` - I am an extremely simple dynamic resource; an embedded python script.
  - `twisted.web.script.ResourceScriptDirectory` - No summary
  - `twisted.web.script.ResourceScriptWrapper` - Undocumented
  - `twisted.web.soap.SOAPPublisher` - Publish SOAP methods.
  - `twisted.web.static.ASISProcessor` - Serve files exactly as responses without generating a status-line or any headers. Inspired by Apache's mod_asis.
  - `twisted.web.static.Data` - This is a static, in-memory resource.
    - `twisted.web.demo.Test` - Undocumented
  - `twisted.web.static.DirectoryLister` - Print the content of a directory.
  - `twisted.web.static.File` - No summary
  - `twisted.web.static.Redirect` - Undocumented
  - `twisted.web.tap._AddHeadersResource` - Undocumented
  - `twisted.web.twcgi.CGIDirectory` - Undocumented
  - `twisted.web.twcgi.CGIScript` - `CGIScript` is a resource which runs child processes according to the CGI specification.
    - `twisted.web.twcgi.FilteredScript` - I am a special version of a CGI script, that uses a specific executable.
  - `twisted.web.util.DeferredResource` - I wrap up a Deferred that will eventually result in a Resource object.
  - `twisted.web.util.ParentRedirect` - Redirect to the nearest directory and strip any query string.
  - `twisted.web.util.Redirect` - Resource that redirects to a specific URL.
    - `twisted.web.util.ChildRedirector` - Undocumented
  - `twisted.web.vhost._HostResource` - Undocumented
  - `twisted.web.vhost.NameVirtualHost` - I am a resource which represents named virtual hosts.
  - `twisted.web.vhost.VHostMonsterResource` - No summary
  - `twisted.web.xmlrpc.XMLRPC` - A resource that implements XML-RPC.
    - `twisted.web.xmlrpc.XMLRPCIntrospection` - Implement the XML-RPC Introspection API.
- `twisted.web.script.CacheScanner` - Undocumented
- `twisted.web.server._GzipEncoder` - An encoder which supports gzip.
- `twisted.web.server._RemoteProducerWrapper` - Undocumented
- `twisted.web.server.GzipEncoderFactory` -
- `twisted.web.soap.Proxy` - A Proxy for making remote SOAP calls.
- `twisted.web.static.StaticProducer` - Superclass for classes that implement the business of producing.
  - `twisted.web.static.MultipleRangeStaticProducer` - A `StaticProducer` that writes several chunks of a file to the request.
  - `twisted.web.static.NoRangeStaticProducer` - A `StaticProducer` that writes the entire file to the request.
  - `twisted.web.static.SingleRangeStaticProducer` - A `StaticProducer` that writes a single chunk of a file to the request.
- `twisted.web.template.CharRef` - A numeric character reference. Given a separate representation in the DOM so that non-ASCII characters may be output as pure ASCII.
- `twisted.web.template.TagLoader` - An `ITemplateLoader` that loads an existing flattenable object.
- `twisted.web.template.XMLFile` - An `ITemplateLoader` that loads and parses XML from a file.
- `twisted.web.template.XMLString` - An `ITemplateLoader` that loads and parses XML from a string.
- `twisted.web.wsgi._ErrorStream` - File-like object instances of which are used as the value for the `'wsgi.errors'` key in the `environ` dictionary passed to the application object.
- `twisted.web.wsgi._InputStream` - File-like object instances of which are used as the value for the `'wsgi.input'` key in the `environ` dictionary passed to the application object.
- `twisted.web.wsgi._WSGIResponse` - Helper for `WSGIResource` which drives the WSGI application using a threadpool and hooks it up to the `http.Request`.
- `twisted.web.wsgi.WSGIResource` - An `IResource` implementation which delegates responsibility for all resources hierarchically inferior to it to a WSGI application.
- `twisted.web.xmlrpc.Fault`
  - `twisted.web.xmlrpc.NoSuchFunction` - There is no function by the given name.
- `twisted.web.xmlrpc.Handler` - Handle a XML-RPC request and store the state for a request in progress.
- `twisted.web.xmlrpc.Proxy` - A Proxy for making remote XML-RPC calls.
- `twisted.words.im.baseaccount.AccountManager` - I am responsible for managing a user's accounts.
- `twisted.words.im.basechat.ChatUI` - A GUI chat client.
- `twisted.words.im.basechat.ContactsList` - A GUI object that displays a contacts list.
- `twisted.words.im.basechat.Conversation` - A GUI window of a conversation with a specific person.
- `twisted.words.im.basechat.GroupConversation` - A GUI window of a conversation with a group of people.
- `twisted.words.im.basesupport.AbstractClientMixin` - Designed to be mixed in to a Protocol implementing class.
  - `twisted.words.im.ircsupport.IRCProto` - No class docstring; 0/10 instance variable, 2/21 methods documented
  - `twisted.words.im.pbsupport.TwistedWordsClient` - In some cases, this acts as an Account, since it a source of text messages (multiple Words instances may be on a single PB connection)
- `twisted.words.im.basesupport.AbstractGroup` - No class docstring; 0/2 instance variable, 2/7 methods documented
  - `twisted.words.im.ircsupport.IRCGroup` - Undocumented
  - `twisted.words.im.pbsupport.TwistedWordsGroup` - No class docstring; 0/1 instance variable, 1/7 method documented
- `twisted.words.im.basesupport.AbstractPerson` - No class docstring; 0/3 instance variable, 2/5 methods documented
  - `twisted.words.im.ircsupport.IRCPerson` - Undocumented
  - `twisted.words.im.pbsupport.TwistedWordsPerson` - I a facade for a person you can talk to through a twisted.words service.
- `twisted.words.im.locals.Enum` - Undocumented
  - `twisted.words.im.locals.StatusEnum` - Undocumented
- `twisted.words.protocols.irc._CommandDispatcherMixin` - Dispatch commands to handlers based on their name.
  - `twisted.words.protocols.irc._FormattingParser` - A finite-state machine that parses formatted IRC text.
  - `twisted.words.protocols.irc.ServerSupportedFeatures` - Handle ISUPPORT messages.
- `twisted.words.protocols.jabber.client.CheckVersionInitializer` - Initializer that checks if the minimum common stream version number is 1.0.
- `twisted.words.protocols.jabber.client.IQAuthInitializer` - Non-SASL Authentication initializer for the initiating entity.
- `twisted.words.protocols.jabber.component.ComponentInitiatingInitializer` - External server-side component authentication initializer for the initiating entity.
- `twisted.words.protocols.jabber.component.Router` - XMPP Server's Router.
- `twisted.words.protocols.jabber.jid.JID` - Represents a stringprep'd Jabber ID.
- `twisted.words.protocols.jabber.sasl_mechanisms.Anonymous` - Implements the ANONYMOUS SASL authentication mechanism.
- `twisted.words.protocols.jabber.sasl_mechanisms.DigestMD5` - Implements the DIGEST-MD5 SASL authentication mechanism.
- `twisted.words.protocols.jabber.sasl_mechanisms.Plain` - Implements the PLAIN SASL authentication mechanism.
- `twisted.words.protocols.jabber.xmlstream.Authenticator` - Base class for business logic of initializing an XmlStream
  - `twisted.words.protocols.jabber.xmlstream.ConnectAuthenticator` - Authenticator for initiating entities.
    - `twisted.words.protocols.jabber.client.BasicAuthenticator` - Authenticates an XmlStream against a Jabber server as a Client.
    - `twisted.words.protocols.jabber.client.XMPPAuthenticator` - Initializes an XmlStream connecting to an XMPP server as a Client.
    - `twisted.words.protocols.jabber.component.ConnectComponentAuthenticator` - Authenticator to permit an XmlStream to authenticate against a Jabber server as an external component (where the Authenticator is initiating the stream).
  - `twisted.words.protocols.jabber.xmlstream.ListenAuthenticator` - Authenticator for receiving entities.
    - `twisted.words.protocols.jabber.component.ListenComponentAuthenticator` - Authenticator for accepting components.
- `twisted.words.protocols.jabber.xmlstream.BaseFeatureInitiatingInitializer` - Base class for initializers with a stream feature.
  - `twisted.words.protocols.jabber.client.BindInitializer` - Initializer that implements Resource Binding for the initiating entity.
  - `twisted.words.protocols.jabber.client.SessionInitializer` - Initializer that implements session establishment for the initiating entity.
  - `twisted.words.protocols.jabber.sasl.SASLInitiatingInitializer` - Stream initializer that performs SASL authentication.
  - `twisted.words.protocols.jabber.xmlstream.TLSInitiatingInitializer` - TLS stream initializer for the initiating entity.
- `twisted.words.protocols.jabber.xmlstream.XMPPHandler` - XMPP protocol handler.
- `twisted.words.protocols.jabber.xmlstream.XMPPHandlerCollection` - Collection of XMPP subprotocol handlers.
  - `twisted.words.protocols.jabber.xmlstream.StreamManager` - Business logic representing a managed XMPP connection.
- `twisted.words.protocols.jabber.xmpp_stringprep.EmptyMappingTable` - Undocumented
- `twisted.words.protocols.jabber.xmpp_stringprep.LookupTable` - Undocumented
- `twisted.words.protocols.jabber.xmpp_stringprep.LookupTableFromFunction` - Undocumented
- `twisted.words.protocols.jabber.xmpp_stringprep.MappingTableFromFunction` - Undocumented
- `twisted.words.protocols.jabber.xmpp_stringprep.NamePrep` - Implements preparation of internationalized domain names.
- `twisted.words.protocols.jabber.xmpp_stringprep.Profile` - Undocumented
- `twisted.words.service.Group` - Undocumented
- `twisted.words.service.User` - Undocumented
- `twisted.words.service.WordsRealm` - No class docstring; 0/1 instance variable, 0/3 class variable, 2/14 methods documented
  - `twisted.words.service.InMemoryWordsRealm` - Undocumented
- `twisted.words.xish.domish._ListSerializer` - Internal class which serializes an Element tree into a buffer
- `twisted.words.xish.domish.Element` - Represents an XML element node.
  - `twisted.words.protocols.jabber.client.IQ` - Wrapper for a Info/Query packet.
  - `twisted.words.protocols.jabber.xmlstream.IQ` - Wrapper for an iq stanza.
- `twisted.words.xish.domish.ExpatElementStream` - Undocumented
- `twisted.words.xish.domish.Namespace` - Convenience object for tracking namespace declarations.
- `twisted.words.xish.utility._MethodWrapper` - Internal class for tracking method calls.
- `twisted.words.xish.utility.CallbackList` - Container for callbacks.
- `twisted.words.xish.utility.EventDispatcher` - Event dispatching service.
  - `twisted.words.xish.xmlstream.XmlStream` - Generic Streaming XML protocol handler.
    - `twisted.words.protocols.jabber.xmlstream.XmlStream` - XMPP XML Stream protocol handler.
- `twisted.words.xish.utility.XmlPipe` - XML stream pipe.
- `twisted.words.xish.xmlstream.BootstrapMixin` - XmlStream factory mixin to install bootstrap event observers.
  - `twisted.words.protocols.jabber.xmlstream.XmlStreamServerFactory` - Factory for Jabber XmlStream objects as a server.
    - `twisted.words.protocols.jabber.component.XMPPComponentServerFactory` - XMPP Component Server factory.
  - `twisted.words.xish.xmlstream.XmlStreamFactoryMixin` - XmlStream factory mixin that takes care of event handlers.
    - `twisted.words.xish.xmlstream.XmlStreamFactory` - Factory for XmlStream protocol objects as a reconnection client.
      - `twisted.words.protocols.jabber.xmlstream.XmlStreamFactory` - Factory for Jabber XmlStream objects as a reconnecting client.
- `twisted.words.xish.xpath._AnyLocation` - Undocumented
- `twisted.words.xish.xpath._Location` - Undocumented
- `twisted.words.xish.xpath._not_Function` - Undocumented
- `twisted.words.xish.xpath._text_Function` - Undocumented
- `twisted.words.xish.xpath.AttribValue` - Undocumented
- `twisted.words.xish.xpath.BooleanValue` - Provide boolean XPath expression operators.
- `twisted.words.xish.xpath.CompareValue` - Undocumented
- `twisted.words.xish.xpath.IndexValue` - Undocumented
- `twisted.words.xish.xpath.XPathQuery` - Undocumented
- `type`
  - `twisted.protocols.amp._CommandLocatorMeta` - No summary
  - `twisted.protocols.amp._CommandMeta` - Metaclass hack to establish reverse-mappings for 'errors' and 'fatalErrors' as class vars.
- `TypeError`
  - `twisted.internet.defer.NotACoroutineError` - This error is raised when a coroutine is expected and something else is encountered.
- `typing.MutableMapping`
  - `twisted.python.util.InsensitiveDict` - Dictionary, that has case-insensitive keys.
- `unittest.TestCase`
  - `twisted.trial._synctest._Assertions` - Replaces many of the built-in TestCase assertions. In general, these assertions provide better error messages and are easier to use in callbacks.
    - `twisted.trial.unittest.SynchronousTestCase` - A unit test. The atom of the unit testing universe.
      - `twisted.trial.unittest.TestCase` - A unit test. The atom of the unit testing universe.
- `unittest.TestResult`
  - `twisted.trial.reporter.TestResult` - Accumulates the results of several `twisted.trial.unittest.TestCase`s.
    - `twisted.trial._dist.workerreporter.WorkerReporter` - Reporter for trial's distributed workers. We send things not through a stream, but through an `AMP` protocol's `callRemote` method.
    - `twisted.trial.reporter.Reporter` - A basic `TestResult` with support for writing to a stream.
      - `twisted.trial.reporter.MinimalReporter` - A minimalist reporter that prints only a summary of the test result, in the form of (timeTaken, #tests, #tests, #errors, #failures, #skips).
      - `twisted.trial.reporter.TextReporter` - Simple reporter that prints a single character for each test as it runs, along with the standard Trial summary text.
      - `twisted.trial.reporter.TreeReporter` - Print out the tests in the form a tree.
      - `twisted.trial.reporter.VerboseTextReporter` - A verbose reporter that prints the name of each test as it is running.
        - `twisted.trial.reporter.TimingTextReporter` - Prints out each test as it is running, followed by the time taken for each test to run.
- `unittest.TestSuite`
  - `twisted.trial.unittest.TestSuite` - Extend the standard library's `TestSuite` with a consistently overrideable `run` method.
    - `twisted.trial.runner.DestructiveTestSuite` - A test suite which remove the tests once run, to minimize memory usage.
    - `twisted.trial.runner.LoggedSuite` - Any errors logged in this suite will be reported to the `TestResult` object.
    - `twisted.trial.runner.TrialSuite` - Suite to wrap around every single test in a `trial` run. Used internally by Trial to set up things necessary for Trial tests to work, regardless of what context they are run in.
- `ValueError`
  - `twisted.conch.interfaces.EnvironmentVariableNotPermitted` - Setting this environment variable in this session is not permitted.
  - `twisted.internet.error.AlreadyCalled` - Undocumented
  - `twisted.internet.error.AlreadyCancelled` - Undocumented
  - `twisted.internet.error.InvalidAddressError` - An invalid address was specified (i.e. neither IPv4 or IPv6, or expected one and got the other).
  - `twisted.names.dns.DNSDecodeError` - Raised when a DNS message cannot be decoded because it violates a protocol-level safety limit.
  - `twisted.names.error.AuthoritativeDomainError` - Indicates a lookup failed for a name for which this server is authoritative because there were no records matching the given `name, class, type` triple.
  - `twisted.names.error.DomainError` - Indicates a lookup failed because there were no records matching the given `name, class, type` triple.
    - `twisted.names.error.DNSFormatError` - Indicates a query failed with a result of `twisted.names.dns.EFORMAT`.
    - `twisted.names.error.DNSNameError` - Indicates a query failed with a result of `twisted.names.dns.ENAME`.
    - `twisted.names.error.DNSNotImplementedError` - Indicates a query failed with a result of `twisted.names.dns.ENOTIMP`.
    - `twisted.names.error.DNSQueryRefusedError` - Indicates a query failed with a result of `twisted.names.dns.EREFUSED`.
    - `twisted.names.error.DNSServerError` - Indicates a query failed with a result of `twisted.names.dns.ESERVER`.
    - `twisted.names.error.DNSUnknownError` - Indicates a query failed with an unknown result.
  - `twisted.protocols.basic.NetstringParseError` - The incoming data is not in valid Netstring format.
  - `twisted.python.reflect.InvalidName` - The given name is not a dot-separated list of Python objects.
    - `twisted.python.reflect.ModuleNotFound` - The module associated with the given name doesn't exist and it can't be imported.
    - `twisted.python.reflect.ObjectNotFound` - The object associated with the given name doesn't exist and it can't be imported.
  - `twisted.words.protocols.irc.IRCBadModes` - A malformed mode was encountered while attempting to parse a mode string.
- `Warning`
  - `twisted.internet.error.PotentialZombieWarning` - Emitted when `IReactorProcess.spawnProcess` is called in a way which may result in termination of the created child process not being reported.
  - `twisted.trial.reporter.BrokenTestCaseWarning` - Emitted as a warning when an exception occurs in one of setUp or tearDown.
- `wxPython.wx.wxTimer`
  - `twisted.internet.wxreactor.ProcessEventsTimer` - Timer that tells wx to process pending events.
- `xml.sax.handler.ContentHandler`
  - `twisted.web._template_util._ToStan` - A SAX parser which converts an XML document to the Twisted STAN Document Object Model.
- `xml.sax.handler.EntityResolver`
  - `twisted.web._template_util._ToStan` - A SAX parser which converts an XML document to the Twisted STAN Document Object Model.
- `zipfile.ZipFile`
  - `twisted.python.zipstream.ChunkingZipFile` - A `zipfile.ZipFile` object which, with `readfile`, also gives you access to a file-like object for each entry.
- `zope.interface.Interface`
  - `twisted._threads.IWorker` - A worker that can perform some work concurrently.
    - `twisted._threads._ithreads.IExclusiveWorker` - Like `IWorker`, but with the additional guarantee that the callables passed to `do` will not be called exclusively with each other.
  - `twisted.application.reactors.IReactorInstaller` - Definition of a reactor which can probably be installed.
  - `twisted.application.runner._pidfile.IPIDFile` - Manages a file that remembers a process ID.
  - `twisted.application.service.IProcess` - Process running parameters.
  - `twisted.application.service.IService` - A service.
  - `twisted.application.service.IServiceCollection` - Collection of services.
  - `twisted.application.service.IServiceMaker` - An object which can be used to construct services in a flexible way.
  - `twisted.conch.checkers.IAuthorizedKeysDB` - An object that provides valid authorized ssh keys mapped to usernames.
  - `twisted.conch.endpoints._ISSHConnectionCreator` - An `_ISSHConnectionCreator` knows how to create SSH connections somehow.
  - `twisted.conch.insults.insults.ITerminalProtocol` - No interface docstring; 5/5 methods documented
  - `twisted.conch.interfaces.IConchUser` - A user who has been authenticated to Cred through Conch. This is the interface between the SSH connection and the user.
  - `twisted.conch.interfaces.IKnownHostEntry` - A `IKnownHostEntry` is an entry in an OpenSSH-formatted `known_hosts` file.
  - `twisted.conch.interfaces.ISession` - No interface docstring; 6/6 methods documented
  - `twisted.conch.interfaces.ISessionSetEnv` - A session that can set environment variables.
  - `twisted.conch.interfaces.ISFTPFile` - This represents an open file on the server. An object adhering to this interface should be returned from `openFile`().
  - `twisted.conch.interfaces.ISFTPServer` - SFTP subsystem for server-side communication.
  - `twisted.conch.ssh._kex._IKexAlgorithm` - An `_IKexAlgorithm` describes a key exchange algorithm.
    - `twisted.conch.ssh._kex._IEllipticCurveExchangeKexAlgorithm` - An `_IEllipticCurveExchangeKexAlgorithm` describes a key exchange algorithm that uses an elliptic curve exchange between the client and server.
    - `twisted.conch.ssh._kex._IFixedGroupKexAlgorithm` - An `_IFixedGroupKexAlgorithm` describes a key exchange algorithm with a fixed prime / generator group.
    - `twisted.conch.ssh._kex._IGroupExchangeKexAlgorithm` - An `_IGroupExchangeKexAlgorithm` describes a key exchange algorithm that uses group exchange between the client and server.
  - `twisted.cred.checkers.ICredentialsChecker` - An object that can check sub-interfaces of `ICredentials`.
  - `twisted.cred.credentials.ICredentials` - I check credentials.
    - `twisted.cred.credentials.IAnonymous` - I am an explicitly anonymous request for access.
    - `twisted.cred.credentials.ISSHPrivateKey` - `ISSHPrivateKey` credentials encapsulate an SSH public key to be checked against a user's private key.
    - `twisted.cred.credentials.IUsernameHashedPassword` - I encapsulate a username and a hashed password.
    - `twisted.cred.credentials.IUsernamePassword` - I encapsulate a username and a plaintext password.
    - `twisted.spread.pb.IUsernameMD5Password` - I encapsulate a username and a hashed password.
    - `twisted.web.iweb.IUsernameDigestHash` - This credential is used when a CredentialChecker has access to the hash of the username:realm:password as in an Apache .htdigest file.
  - `twisted.cred.portal.IRealm` - The realm connects application-specific objects to the authentication system.
  - `twisted.cred.strcred.ICheckerFactory` - A factory for objects which provide `twisted.cred.checkers.ICredentialsChecker`.
  - `twisted.internet._sslverify.IOpenSSLTrustRoot` - Trust settings for an OpenSSL context.
  - `twisted.internet.interfaces._ISupportsExitSignalCapturing` - No summary
  - `twisted.internet.interfaces.IAcceptableCiphers` - A list of acceptable ciphers for a TLS context.
  - `twisted.internet.interfaces.IAddress` - An address, e.g. a TCP `(host, port)`.
  - `twisted.internet.interfaces.ICipher` - A TLS cipher.
  - `twisted.internet.interfaces.IConnector` - Object used to interface between connections and protocols.
  - `twisted.internet.interfaces.IConsumer` - A consumer consumes data from a producer.
    - `twisted.internet.endpoints._IProcessTransportWithConsumerAndProducer` - No summary
    - `twisted.protocols.ftp.IFinishableConsumer` - A Consumer for producers that finish.
  - `twisted.internet.interfaces.IDelayedCall` - A scheduled call.
  - `twisted.internet.interfaces.IFileDescriptorReceiver` - No summary
  - `twisted.internet.interfaces.IHalfCloseableDescriptor` - A descriptor that can be half-closed.
  - `twisted.internet.interfaces.IHalfCloseableProtocol` - Implemented to indicate they want notification of half-closes.
  - `twisted.internet.interfaces.IHandshakeListener` - An interface implemented by a `IProtocol` to indicate that it would like to be notified when TLS handshakes complete when run over a TLS-based transport.
  - `twisted.internet.interfaces.IHostnameResolver` - An `IHostnameResolver` can resolve a host name and port number into a series of `IAddress` objects.
  - `twisted.internet.interfaces.IHostResolution` - An `IHostResolution` represents represents an in-progress recursive query for a DNS name.
  - `twisted.internet.interfaces.IListeningPort` - A listening port.
  - `twisted.internet.interfaces.ILoggingContext` - Give context information that will be used to log events generated by this item.
    - `twisted.internet.interfaces.IFileDescriptor` - An interface representing a UNIX-style numeric file descriptor.
      - `twisted.internet.interfaces.IReadDescriptor` - An `IFileDescriptor` that can read.
        - `twisted.internet.interfaces.IReadWriteDescriptor` - An `IFileDescriptor` that can both read and write.
      - `twisted.internet.interfaces.IWriteDescriptor` - An `IFileDescriptor` that can write.
        - `twisted.internet.interfaces.IReadWriteDescriptor` - An `IFileDescriptor` that can both read and write.
  - `twisted.internet.interfaces.IMulticastTransport` - Additional functionality for multicast UDP.
  - `twisted.internet.interfaces.IOpenSSLClientConnectionCreator` - A provider of `IOpenSSLClientConnectionCreator` can create `OpenSSL.SSL.Connection` objects for TLS clients.
  - `twisted.internet.interfaces.IOpenSSLContextFactory` - No summary
  - `twisted.internet.interfaces.IOpenSSLServerConnectionCreator` - A provider of `IOpenSSLServerConnectionCreator` can create `OpenSSL.SSL.Connection` objects for TLS servers.
  - `twisted.internet.interfaces.IProcessProtocol` - Interface for process-related event handlers.
  - `twisted.internet.interfaces.IProducer` - A producer produces data for a consumer.
    - `twisted.internet.interfaces.IPullProducer` - A pull producer, also known as a non-streaming producer, is expected to produce data each time `resumeProducing()` is called.
    - `twisted.internet.interfaces.IPushProducer` - No summary
      - `twisted.internet.endpoints._IProcessTransportWithConsumerAndProducer` - No summary
      - `twisted.web.iweb.IBodyProducer` - Objects which provide `IBodyProducer` write bytes to an object which provides `IConsumer` by calling its `write` method repeatedly.
  - `twisted.internet.interfaces.IProtocol` - No interface docstring; 4/4 methods documented
    - `twisted.conch.telnet.ITelnetProtocol` - No interface docstring; 6/6 methods documented
  - `twisted.internet.interfaces.IProtocolFactory` - Interface for protocol factories.
  - `twisted.internet.interfaces.IProtocolNegotiationFactory` - No summary
  - `twisted.internet.interfaces.IReactorCore` - Core methods that a Reactor must implement.
  - `twisted.internet.interfaces.IReactorDaemonize` - A reactor which provides hooks that need to be called before and after daemonization.
  - `twisted.internet.interfaces.IReactorFDSet` - Implement me to be able to use `IFileDescriptor` type resources.
  - `twisted.internet.interfaces.IReactorFromThreads` - This interface is the set of thread-safe methods which may be invoked on the reactor from other threads.
    - `twisted.internet.interfaces.IReactorThreads` - Dispatch methods to be run in threads.
  - `twisted.internet.interfaces.IReactorInThreads` - This interface contains the methods exposed by a reactor which will let you run functions in another thread.
    - `twisted.internet.interfaces.IReactorThreads` - Dispatch methods to be run in threads.
  - `twisted.internet.interfaces.IReactorMulticast` - UDP socket methods that support multicast.
  - `twisted.internet.interfaces.IReactorPluggableNameResolver` - An `IReactorPluggableNameResolver` is a reactor whose name resolver can be set to a user-supplied object.
  - `twisted.internet.interfaces.IReactorPluggableResolver` - An `IReactorPluggableResolver` is a reactor which can be customized with an `IResolverSimple`. This is a fairly limited interface, that supports only IPv4; you should use `IReactorPluggableNameResolver` instead.
  - `twisted.internet.interfaces.IReactorProcess` - No interface docstring; 1/1 method documented
  - `twisted.internet.interfaces.IReactorSocket` - Methods which allow a reactor to use externally created sockets.
  - `twisted.internet.interfaces.IReactorSSL` - No interface docstring; 2/2 methods documented
  - `twisted.internet.interfaces.IReactorTCP` - No interface docstring; 2/2 methods documented
  - `twisted.internet.interfaces.IReactorTime` - Time methods that a Reactor should implement.
  - `twisted.internet.interfaces.IReactorUDP` - UDP socket methods.
  - `twisted.internet.interfaces.IReactorUNIX` - UNIX socket methods.
  - `twisted.internet.interfaces.IReactorUNIXDatagram` - Datagram UNIX socket methods.
  - `twisted.internet.interfaces.IReactorWin32Events` - Win32 Event API methods
  - `twisted.internet.interfaces.IResolutionReceiver` - An `IResolutionReceiver` receives the results of a hostname resolution in progress, initiated by an `IHostnameResolver`.
  - `twisted.internet.interfaces.IResolverSimple` - No interface docstring; 1/1 method documented
    - `twisted.internet.interfaces.IResolver` - No interface docstring; 24/24 methods documented
  - `twisted.internet.interfaces.IServiceCollection` - An object which provides access to a collection of services.
  - `twisted.internet.interfaces.IStreamClientEndpoint` - A stream client endpoint is a place that `ClientFactory` can connect to. For example, a remote TCP host/port pair would be a TCP client endpoint.
  - `twisted.internet.interfaces.IStreamClientEndpointStringParserWithReactor` - An `IStreamClientEndpointStringParserWithReactor` is a parser which can convert a set of string `*args` and `**kwargs` into an `IStreamClientEndpoint` provider.
  - `twisted.internet.interfaces.IStreamServerEndpoint` - A stream server endpoint is a place that a `Factory` can listen for incoming connections.
  - `twisted.internet.interfaces.IStreamServerEndpointStringParser` - No summary
  - `twisted.internet.interfaces.ISystemHandle` - An object that wraps a networking OS-specific handle.
  - `twisted.internet.interfaces.ITransport` - I am a transport for bytes.
    - `twisted.conch.insults.insults.ITerminalTransport` - No interface docstring; 41/41 methods documented
    - `twisted.conch.telnet.ITelnetTransport` - No interface docstring; 5/5 methods documented
    - `twisted.internet.interfaces.IProcessTransport` - A process transport.
      - `twisted.internet.endpoints._IProcessTransportWithConsumerAndProducer` - No summary
    - `twisted.internet.interfaces.ITCPTransport` - A TCP based transport.
      - `twisted.internet.interfaces.ISSLTransport` - A SSL/TLS based transport.
        - `twisted.internet.interfaces.INegotiated` - A TLS based transport that supports using ALPN/NPN to negotiate the protocol to be used inside the encrypted tunnel.
      - `twisted.internet.interfaces.ITLSTransport` - A TCP transport that supports switching to TLS midstream.
    - `twisted.internet.interfaces.IUNIXTransport` - Transport for stream-oriented unix domain connections.
  - `twisted.internet.interfaces.IUDPTransport` - Transport for UDP DatagramProtocols.
  - `twisted.internet.interfaces.IUNIXDatagramConnectedTransport` - Transport for UDP ConnectedPacketProtocols.
  - `twisted.internet.interfaces.IUNIXDatagramTransport` - Transport for UDP PacketProtocols.
  - `twisted.internet.iocpreactor.interfaces.IReadHandle` - No interface docstring; 1/1 method documented
    - `twisted.internet.iocpreactor.interfaces.IReadWriteHandle` - Undocumented
  - `twisted.internet.iocpreactor.interfaces.IWriteHandle` - No interface docstring; 1/1 method documented
    - `twisted.internet.iocpreactor.interfaces.IReadWriteHandle` - Undocumented
  - `twisted.internet.kqreactor._IKQueue` - An interface for KQueue implementations.
  - `twisted.internet.posixbase._IWaker` - Interface to wake up the event loop based on the self-pipe trick.
  - `twisted.internet.tcp._IFileDescriptorReservation` - No summary
  - `twisted.logger.ILogFilterPredicate` - A predicate that determined whether an event should be logged.
  - `twisted.logger.ILogObserver` - An observer which can handle log events.
  - `twisted.mail.interfaces.IAccountIMAP` - Interface for Account classes
  - `twisted.mail.interfaces.IAlias` - An interface for aliases.
  - `twisted.mail.interfaces.IChallengeResponse` - An `IMAPrev4` authorization challenge mechanism.
  - `twisted.mail.interfaces.IClientAuthentication` - No interface docstring; 2/2 methods documented
  - `twisted.mail.interfaces.ICloseableMailboxIMAP` - A supplementary interface for mailboxes which require cleanup on close.
  - `twisted.mail.interfaces.IDomain` - An interface for email domains.
    - `twisted.mail.interfaces.IAliasableDomain` - An interface for email domains which can be aliased to other domains.
  - `twisted.mail.interfaces.IMailboxIMAPInfo` - Interface specifying only the methods required for `listMailboxes`.
    - `twisted.mail.interfaces.IMailboxIMAP` - No interface docstring; 15/15 methods documented
  - `twisted.mail.interfaces.IMailboxIMAPListener` - Interface for objects interested in mailbox events
  - `twisted.mail.interfaces.IMailboxPOP3` - An interface for mailbox access.
  - `twisted.mail.interfaces.IMessageDelivery` - No interface docstring; 3/3 methods documented
  - `twisted.mail.interfaces.IMessageDeliveryFactory` - An alternate interface to implement for handling message delivery.
  - `twisted.mail.interfaces.IMessageIMAPCopier` - No interface docstring; 1/1 method documented
  - `twisted.mail.interfaces.IMessageIMAPFile` - Optional message interface for representing messages as files.
  - `twisted.mail.interfaces.IMessageIMAPPart` - No interface docstring; 5/5 methods documented
    - `twisted.mail.interfaces.IMessageIMAP` - No interface docstring; 3/3 methods documented
  - `twisted.mail.interfaces.IMessageSMTP` - Interface definition for messages that can be sent via SMTP.
  - `twisted.mail.interfaces.INamespacePresenter` - No interface docstring; 3/3 methods documented
  - `twisted.mail.interfaces.ISearchableIMAPMailbox` - No interface docstring; 1/1 method documented
  - `twisted.mail.interfaces.IServerFactoryPOP3` - An interface for querying capabilities of a POP3 server.
  - `twisted.names.dns.IEncodable` - Interface for something which can be encoded to and decoded to the DNS wire format.
    - `twisted.names.dns.IEncodableRecord` - Interface for DNS records that can be encoded and decoded.
  - `twisted.names.dns.IRecord` - A single entry in a zone of authority.
    - `twisted.names.dns.IEncodableRecord` - Interface for DNS records that can be encoded and decoded.
  - `twisted.pair.ethernet.IEthernetProtocol` - An interface for protocols that handle Ethernet frames
  - `twisted.pair.raw.IRawDatagramProtocol` - An interface for protocols such as UDP, ICMP and TCP.
  - `twisted.pair.raw.IRawPacketProtocol` - An interface for low-level protocols such as IP and ARP.
  - `twisted.pair.tuntap._IInputOutputSystem` - An interface for performing some basic kinds of I/O (particularly that I/O which might be useful for `twisted.pair.tuntap`-using code).
  - `twisted.persisted.sob.IPersistable` - An object which can be saved in several formats to a file
  - `twisted.plugin.IPlugin` - Interface that must be implemented by all plugins.
  - `twisted.positioning.ipositioning.INMEAReceiver` - An object that can receive NMEA data.
  - `twisted.positioning.ipositioning.IPositioningBeacon` - A positioning beacon.
  - `twisted.positioning.ipositioning.IPositioningReceiver` - An interface for positioning providers.
  - `twisted.protocols.amp.IArgumentType` - An `IArgumentType` can serialize a Python object into an AMP box and deserialize information from an AMP box back into a Python object.
  - `twisted.protocols.amp.IBoxReceiver` - An application object which can receive `AmpBox` objects and dispatch them appropriately.
  - `twisted.protocols.amp.IBoxSender` - A transport which can send `AmpBox` objects.
  - `twisted.protocols.amp.IResponderLocator` - An application object which can look up appropriate responder methods for AMP commands.
  - `twisted.protocols.ftp.IFTPShell` - An abstraction of the shell commands used by the FTP protocol for a given user account.
  - `twisted.protocols.ftp.IReadFile` - A file out of which bytes may be read.
  - `twisted.protocols.ftp.IWriteFile` - A file into which bytes may be written.
  - `twisted.protocols.haproxy._interfaces.IProxyInfo` - Data container for PROXY protocol header data.
  - `twisted.protocols.haproxy._interfaces.IProxyParser` - Streaming parser that handles PROXY protocol headers.
  - `twisted.protocols.htb.IBucketFilter` - No interface docstring; 1/1 method documented
  - `twisted.protocols.sip.IAuthorizer` - No interface docstring; 2/2 methods documented
  - `twisted.protocols.sip.IContact` - A user of a registrar or proxy
  - `twisted.protocols.sip.ILocator` - Allow looking up physical address for logical URL.
  - `twisted.protocols.sip.IRegistry` - Allows registration of logical->physical URL mapping.
  - `twisted.python._release.IVCSCommand` - An interface for VCS commands.
  - `twisted.python.filepath.IFilePath` - File path object.
  - `twisted.python.log.ILogObserver` - An observer which can do something with log events.
  - `twisted.python.modules.IPathImportMapper` - This is an internal interface, used to map importers to factories for FilePath-like objects.
  - `twisted.spread.interfaces.IJellyable` - No interface docstring; 1/1 method documented
  - `twisted.spread.interfaces.IUnjellyable` - No interface docstring; 1/1 method documented
  - `twisted.spread.pb.IPBRoot` - Factory for root Referenceable objects for PB servers.
  - `twisted.spread.pb.IPerspective` - per*spec*tive, n. : The relationship of aspects of a subject to each other and to a whole: 'a perspective of history'; 'a need to view the problem in the proper perspective'.
  - `twisted.trial.itrial.IReporter` - I report results from a run of a test suite.
  - `twisted.trial.itrial.ITestCase` - The interface that a test case must implement in order to be used in Trial.
  - `twisted.web.http._IDeprecatedHTTPChannelToRequestInterface` - The interface `HTTPChannel` expects of `Request`.
  - `twisted.web.iweb._IRequestEncoder` - An object encoding data passed to `IRequest.write`, for example for compression purpose.
  - `twisted.web.iweb._IRequestEncoderFactory` - A factory for returing `_IRequestEncoder` instances.
  - `twisted.web.iweb.IAccessLogFormatter` - An object which can represent an HTTP request as a line of text for inclusion in an access log file.
  - `twisted.web.iweb.IAgent` - An agent makes HTTP requests.
  - `twisted.web.iweb.IAgentEndpointFactory` - An `IAgentEndpointFactory` provides a way of constructing an endpoint used for outgoing Agent requests. This is useful in the case of needing to proxy outgoing connections, or to otherwise vary the transport used.
  - `twisted.web.iweb.IClientRequest` - An object representing an HTTP request to make to an HTTP server.
  - `twisted.web.iweb.ICredentialFactory` - No summary
  - `twisted.web.iweb.INonQueuedRequestFactory` - A factory of `IRequest` objects that does not take a ``queued`` parameter.
  - `twisted.web.iweb.IPolicyForHTTPS` - No summary
  - `twisted.web.iweb.IRenderable` - An `IRenderable` is an object that may be rendered by the `twisted.web.template` templating system.
  - `twisted.web.iweb.IRequest` - An HTTP request.
  - `twisted.web.iweb.IResponse` - An object representing an HTTP response received from an HTTP server.
  - `twisted.web.iweb.ITemplateLoader` - A loader for templates; something usable as a value for `twisted.web.template.Element`'s `loader` attribute.
  - `twisted.web.resource._IEncodingResource` - A resource which knows about `_IRequestEncoderFactory`.
  - `twisted.web.resource.IResource` - A web resource.
  - `twisted.words.im.interfaces.IAccount` - I represent a user's account with a chat service.
  - `twisted.words.im.interfaces.IChatUI` - No interface docstring; 8/8 methods documented
  - `twisted.words.im.interfaces.IClient` - No interface docstring; 1/1 attribute, 3/5 methods documented
  - `twisted.words.im.interfaces.IConversation` - A conversation with a specific person.
  - `twisted.words.im.interfaces.IGroup` - A group which you may have a conversation with.
  - `twisted.words.im.interfaces.IGroupConversation` - No interface docstring; 7/9 methods documented
  - `twisted.words.im.interfaces.IPerson` - No interface docstring; 5/5 methods documented
  - `twisted.words.iwords.IChatClient` - Interface through which IChatService interacts with clients.
  - `twisted.words.iwords.IChatService` - No interface docstring; 3/3 attributes, 6/6 methods documented
  - `twisted.words.iwords.IGroup` - No interface docstring; 1/1 attribute, 6/6 methods documented
  - `twisted.words.iwords.IProtocolPlugin` - Interface for plugins providing an interface to a Words service
  - `twisted.words.iwords.IUser` - Interface through which clients interact with IChatService.
  - `twisted.words.protocols.jabber.ijabber.IInitializer` - Interface for XML stream initializers.
    - `twisted.words.protocols.jabber.ijabber.IInitiatingInitializer` - Interface for XML stream initializers for the initiating entity.
  - `twisted.words.protocols.jabber.ijabber.IIQResponseTracker` - IQ response tracker interface.
  - `twisted.words.protocols.jabber.ijabber.IService` - External server-side component service interface.
  - `twisted.words.protocols.jabber.ijabber.IXMPPHandler` - Interface for XMPP protocol handlers.
  - `twisted.words.protocols.jabber.ijabber.IXMPPHandlerCollection` - Collection of handlers.
  - `twisted.words.protocols.jabber.sasl_mechanisms.ISASLMechanism` - No interface docstring; 1/1 attribute, 2/2 methods documented
  - `twisted.words.protocols.jabber.xmpp_stringprep.ILookupTable` - Interface for character lookup classes.
  - `twisted.words.protocols.jabber.xmpp_stringprep.IMappingTable` - Interface for character mapping classes.
  - `twisted.words.xish.domish.IElement` - Interface to XML element nodes.