# Configuration options

These options can be set in the configuration file, `~/.jupyter/jupyter_qtconsole_config.py`, or at the command line when you start Qt console.

You may enter `jupyter qtconsole --help-all` to get information about all available configuration options.

## Options

ConnectionFileMixin.connection_file : Unicode

  Default: `''`

  JSON file in which to store connection info [default: kernel-<pid>.json]

  This file will contain the IP, ports, and authentication key needed to connect clients to this kernel. By default, this file will be created in the security dir of the current profile, but can be specified by absolute path.

ConnectionFileMixin.control_port : Int

  Default: `0`

  set the control (ROUTER) port [default: random]

ConnectionFileMixin.hb_port : Int

  Default: `0`

  set the heartbeat port [default: random]

ConnectionFileMixin.iopub_port : Int

  Default: `0`

  set the iopub (PUB) port [default: random]

ConnectionFileMixin.ip : Unicode

  Default: `''`

  Set the kernel’s IP address [default localhost]. If the IP address is something other than localhost, then Consoles on other machines will be able to connect to the Kernel, so be careful!

ConnectionFileMixin.shell_port : Int

  Default: `0`

  set the shell (ROUTER) port [default: random]

ConnectionFileMixin.stdin_port : Int

  Default: `0`

  set the stdin (ROUTER) port [default: random]

ConnectionFileMixin.transport : ‘tcp’|’ipc’

  Default: `'tcp'`

  No description

JupyterConsoleApp.confirm_exit : CBool

  Default: `True`

  Set to display confirmation dialog on exit. You can always use ‘exit’ or ‘quit’, to force a direct exit without any confirmation.

JupyterConsoleApp.existing : CUnicode

  Default: `''`

  Connect to an already running kernel

JupyterConsoleApp.kernel_name : Unicode

  Default: `'python'`

  The name of the default kernel to start.

JupyterConsoleApp.sshkey : Unicode

  Default: `''`

  Path to the ssh key to use for logging in to the ssh server.

JupyterConsoleApp.sshserver : Unicode

  Default: `''`

  The SSH server to use to connect to the kernel.

Application.log_datefmt : Unicode

  Default: `'%Y-%m-%d %H:%M:%S'`

  The date format used by logging formatters for %(asctime)s

Application.log_format : Unicode

  Default: `'[%(name)s]%(highlevel)s %(message)s'`

  The Logging format template

Application.log_level : 0|10|20|30|40|50|’DEBUG’|’INFO’|’WARN’|’ERROR’|’CRITICAL’

  Default: `30`

  Set the log level by value or name.

JupyterApp.answer_yes : Bool

  Default: `False`

  Answer yes to any prompts.

JupyterApp.config_file : Unicode

  Default: `''`

  Full path of a config file.

JupyterApp.config_file_name : Unicode

  Default: `''`

  Specify a config file to load.

JupyterApp.generate_config : Bool

  Default: `False`

  Generate default config file.

JupyterQtConsoleApp.display_banner : CBool

  Default: `True`

  Whether to display a banner upon starting the QtConsole.

JupyterQtConsoleApp.hide_menubar : CBool

  Default: `False`

  Start the console window with the menu bar hidden.

JupyterQtConsoleApp.maximize : CBool

  Default: `False`

  Start the console window maximized.

JupyterQtConsoleApp.plain : CBool

  Default: `False`

  Use a plaintext widget instead of rich text (plain can’t print/save).

JupyterQtConsoleApp.stylesheet : Unicode

  Default: `''`

  path to a custom CSS stylesheet

ConsoleWidget.ansi_codes : Bool

  Default: `True`

  Whether to process ANSI escape codes.

ConsoleWidget.buffer_size : Int

  Default: `500`

  The maximum number of lines of text before truncation. Specifying a non-positive number disables text truncation (not recommended).

ConsoleWidget.console_height : Int

  Default: `25`

  The height of the console at start time in number of characters (will double with `vsplit` paging)

ConsoleWidget.console_width : Int

  Default: `81`

  The width of the console at start time in number of characters (will double with `hsplit` paging)

ConsoleWidget.execute_on_complete_input : Bool

  Default: `True`

  Whether to automatically execute on syntactically complete input.

  If False, Shift-Enter is required to submit each execution. Disabling this is mainly useful for non-Python kernels, where the completion check would be wrong.

ConsoleWidget.font_family : Unicode

  Default: `''`

  The font family to use for the console. On OSX this defaults to Monaco, on Windows the default is Consolas with fallback of Courier, and on other platforms the default is Monospace.

ConsoleWidget.font_size : Int

  Default: `0`

  The font size. If unconfigured, Qt will be entrusted with the size of the font.

ConsoleWidget.gui_completion : ‘plain’|’droplist’|’ncurses’

  Default: `'ncurses'`

  The type of completer to use. Valid values are:

  ‘plain’ : Show the available completion as a text list
    Below the editing area.
  ‘droplist’: Show the completion in a drop down list navigable
    by the arrow keys, and from which you can select completion by pressing Return.
  ‘ncurses’ : Show the completion as a text list which is navigable by
    `tab` and arrow keys.
ConsoleWidget.include_other_output : Bool

  Default: `False`

  Whether to include output from clients other than this one sharing the same kernel.

  Outputs are not displayed until enter is pressed.

ConsoleWidget.kind : ‘plain’|’rich’

  Default: `'plain'`

  The type of underlying text widget to use. Valid values are ‘plain’, which specifies a QPlainTextEdit, and ‘rich’, which specifies a QTextEdit.

ConsoleWidget.paging : ‘inside’|’hsplit’|’vsplit’|’custom’|’none’

  Default: `'inside'`

  The type of paging to use. Valid values are:

  ‘inside’
    The widget pages like a traditional terminal.
  ‘hsplit’
    When paging is requested, the widget is split horizontally. The top pane contains the console, and the bottom pane contains the paged text.
  ‘vsplit’
    Similar to ‘hsplit’, except that a vertical splitter is used.
  ‘custom’
    No action is taken by the widget beyond emitting a ‘custom_page_requested(str)’ signal.
  ‘none’
    The text is written directly to the console.
HistoryConsoleWidget.history_lock : Bool

  Default: `False`

  No description

FrontendWidget.banner : Unicode

  Default: `''`

  No description

FrontendWidget.clear_on_kernel_restart : Bool

  Default: `True`

  Whether to clear the console when the kernel is restarted

FrontendWidget.confirm_restart : Bool

  Default: `True`

  Whether to ask for user confirmation when restarting kernel

FrontendWidget.enable_calltips : Bool

  Default: `True`

  Whether to draw information calltips on open-parentheses.

FrontendWidget.is_complete_timeout : Float

  Default: `0.25`

  Seconds to wait for is_complete replies from the kernel.

FrontendWidget.lexer_class : DottedObjectName

  Default: `traitlets.Undefined`

  The pygments lexer class to use.

JupyterWidget.editor : Unicode

  Default: `''`

  A command for invoking a system text editor. If the string contains a {filename} format specifier, it will be used. Otherwise, the filename will be appended to the end the command.

JupyterWidget.editor_line : Unicode

  Default: `''`

  The editor command to use when a specific line number is requested. The string should contain two format specifiers: {line} and {filename}. If this parameter is not specified, the line number option to the %edit magic will be ignored.

JupyterWidget.in_prompt : Unicode

  Default: `'In [<span class="in-prompt-number">%i</span>]: '`

  No description

JupyterWidget.input_sep : Unicode

  Default: `'\\n'`

  No description

JupyterWidget.out_prompt : Unicode

  Default: `'Out[<span class="out-prompt-number">%i</span>]: '`

  No description

JupyterWidget.output_sep : Unicode

  Default: `''`

  No description

JupyterWidget.output_sep2 : Unicode

  Default: `''`

  No description

JupyterWidget.style_sheet : Unicode

  Default: `''`

  A CSS stylesheet. The stylesheet can contain classes for:
    1. Qt: QPlainTextEdit, QFrame, QWidget, etc
    2. Pygments: .c, .k, .o, etc. (see PygmentsHighlighter)
    3. QtConsole: .error, .in-prompt, .out-prompt, etc
JupyterWidget.syntax_style : Unicode

  Default: `''`

  If not empty, use this Pygments style for syntax highlighting. Otherwise, the style sheet is queried for Pygments style information.

KernelManager.autorestart : Bool

  Default: `True`

  Should we autorestart the kernel if it dies.

KernelManager.kernel_cmd : List

  Default: `[]`

  DEPRECATED: Use kernel_name instead.

  The Popen Command to launch the kernel. Override this if you have a custom kernel. If kernel_cmd is specified in a configuration file, Jupyter does not pass any arguments to the kernel, because it cannot make any assumptions about the arguments that the kernel understands. In particular, this means that the kernel does not receive the option –debug if it given on the Jupyter command line.

KernelManager.shutdown_wait_time : Float

  Default: `5.0`

  Time to wait for a kernel to terminate before killing it, in seconds.

KernelRestarter.debug : Bool

  Default: `False`

  Whether to include every poll event in debugging output.

  Has to be set explicitly, because there will be a lot of output.

KernelRestarter.restart_limit : Int

  Default: `5`

  The number of consecutive autorestarts before the kernel is presumed dead.

KernelRestarter.time_to_dead : Float

  Default: `3.0`

  Kernel heartbeat interval in seconds.

Session.buffer_threshold : Int

  Default: `1024`

  Threshold (in bytes) beyond which an object’s buffer should be extracted to avoid pickling.

Session.check_pid : Bool

  Default: `True`

  Whether to check PID to protect against calls after fork.

  This check can be disabled if fork-safety is handled elsewhere.

Session.copy_threshold : Int

  Default: `65536`

  Threshold (in bytes) beyond which a buffer should be sent without copying.

Session.debug : Bool

  Default: `False`

  Debug output in the Session

Session.digest_history_size : Int

  Default: `65536`

  The maximum number of digests to remember.

  The digest history will be culled when it exceeds this value.

Session.item_threshold : Int

  Default: `64`

  The maximum number of items for a container to be introspected for custom serialization. Containers larger than this are pickled outright.

Session.key : CBytes

  Default: `b''`

  execution key, for signing messages.

Session.keyfile : Unicode

  Default: `''`

  path to file containing execution key.

Session.metadata : Dict

  Default: `{}`

  Metadata dictionary, which serves as the default top-level metadata dict for each message.

Session.packer : DottedObjectName

  Default: `'json'`

  The name of the packer for serializing messages. Should be one of ‘json’, ‘pickle’, or an import name for a custom callable serializer.

Session.session : CUnicode

  Default: `''`

  The UUID identifying this session.

Session.signature_scheme : Unicode

  Default: `'hmac-sha256'`

  The digest scheme used to construct the message signatures. Must have the form ‘hmac-HASH’.

Session.unpacker : DottedObjectName

  Default: `'json'`

  The name of the unpacker for unserializing messages. Only used with custom functions for `packer`.

Session.username : Unicode

  Default: `'buildd'`

  Username for the Session. Default is your system username.