# Source code for imp

    """This module provides the components needed to build your own __import__
    function.  Undocumented functions are obsolete.

    In most cases it is preferred you consider using the importlib module's
    functionality over this module.

    """
    # (Probably) need to stay in _imp
    from _imp import (lock_held, acquire_lock, release_lock,
                      get_frozen_object, is_frozen_package,
                      init_frozen, is_builtin, is_frozen,
                      _fix_co_filename, _frozen_module_names)
    try:
        from _imp import create_dynamic
    except ImportError:
        # Platform doesn't support dynamic loading.
        create_dynamic = None

    from importlib._bootstrap import _ERR_MSG, _exec, _load, _builtin_from_name
    from importlib._bootstrap_external import SourcelessFileLoader

    from importlib import machinery
    from importlib import util
    import importlib
    import os
    import sys
    import tokenize
    import types
    import warnings

    warnings.warn("the imp module is deprecated in favour of importlib and slated "
                  "for removal in Python 3.12; "
                  "see the module's documentation for alternative uses",
                  DeprecationWarning, stacklevel=2)

    # DEPRECATED
    SEARCH_ERROR = 0
    PY_SOURCE = 1
    PY_COMPILED = 2
    C_EXTENSION = 3
    PY_RESOURCE = 4
    PKG_DIRECTORY = 5
    C_BUILTIN = 6
    PY_FROZEN = 7
    PY_CODERESOURCE = 8
    IMP_HOOK = 9

    def new_module(name):
        """**DEPRECATED**

        Create a new module.

        The module is not entered into sys.modules.

        """
        return types.ModuleType(name)

    def get_magic():
        """**DEPRECATED**

        Return the magic number for .pyc files.
        """
        return util.MAGIC_NUMBER

    def get_tag():
        """Return the magic tag for .pyc files."""
        return sys.implementation.cache_tag

    def cache_from_source(path, debug_override=None):
        """**DEPRECATED**

        Given the path to a .py file, return the path to its .pyc file.

        The .py file does not need to exist; this simply returns the path to the
        .pyc file calculated as if the .py file were imported.

        If debug_override is not None, then it must be a boolean and is used in
        place of sys.flags.optimize.

        If sys.implementation.cache_tag is None then NotImplementedError is raised.

        """
        with warnings.catch_warnings():
            warnings.simplefilter('ignore')
            return util.cache_from_source(path, debug_override)

    def source_from_cache(path):
        """**DEPRECATED**

        Given the path to a .pyc. file, return the path to its .py file.

        The .pyc file does not need to exist; this simply returns the path to
        the .py file calculated to correspond to the .pyc file.  If path does
        not conform to PEP 3147 format, ValueError will be raised. If
        sys.implementation.cache_tag is None then NotImplementedError is raised.

        """
        return util.source_from_cache(path)

    def get_suffixes():
        """**DEPRECATED**"""
        extensions = [(s, 'rb', C_EXTENSION) for s in machinery.EXTENSION_SUFFIXES]
        source = [(s, 'r', PY_SOURCE) for s in machinery.SOURCE_SUFFIXES]
        bytecode = [(s, 'rb', PY_COMPILED) for s in machinery.BYTECODE_SUFFIXES]

        return extensions + source + bytecode

    class NullImporter:

        """**DEPRECATED**

        Null import object.

        """

        def __init__(self, path):
            if path == '':
                raise ImportError('empty pathname', path='')
            elif os.path.isdir(path):
                raise ImportError('existing directory', path=path)

        def find_module(self, fullname):
            """Always returns None."""
            return None

    class _HackedGetData:

        """Compatibility support for 'file' arguments of various load_*()
        functions."""

        def __init__(self, fullname, path, file=None):
            super().__init__(fullname, path)
            self.file = file

        def get_data(self, path):
            """Gross hack to contort loader to deal w/ load_*()'s bad API."""
            if self.file and path == self.path:
                # The contract of get_data() requires us to return bytes. Reopen the
                # file in binary mode if needed.
                if not self.file.closed:
                    file = self.file
                    if 'b' not in file.mode:
                        file.close()
                if self.file.closed:
                    self.file = file = open(self.path, 'rb')

                with file:
                    return file.read()
            else:
                return super().get_data(path)

    class _LoadSourceCompatibility(_HackedGetData, machinery.SourceFileLoader):

        """Compatibility support for implementing load_source()."""

    def load_source(name, pathname, file=None):
        loader = _LoadSourceCompatibility(name, pathname, file)
        spec = util.spec_from_file_location(name, pathname, loader=loader)
        if name in sys.modules:
            module = _exec(spec, sys.modules[name])
        else:
            module = _load(spec)
        # To allow reloading to potentially work, use a non-hacked loader which
        # won't rely on a now-closed file object.
        module.__loader__ = machinery.SourceFileLoader(name, pathname)
        module.__spec__.loader = module.__loader__
        return module

    class _LoadCompiledCompatibility(_HackedGetData, SourcelessFileLoader):

        """Compatibility support for implementing load_compiled()."""

    def load_compiled(name, pathname, file=None):
        """**DEPRECATED**"""
        loader = _LoadCompiledCompatibility(name, pathname, file)
        spec = util.spec_from_file_location(name, pathname, loader=loader)
        if name in sys.modules:
            module = _exec(spec, sys.modules[name])
        else:
            module = _load(spec)
        # To allow reloading to potentially work, use a non-hacked loader which
        # won't rely on a now-closed file object.
        module.__loader__ = SourcelessFileLoader(name, pathname)
        module.__spec__.loader = module.__loader__
        return module

    def load_package(name, path):
        """**DEPRECATED**"""
        if os.path.isdir(path):
            extensions = (machinery.SOURCE_SUFFIXES[:] +
                          machinery.BYTECODE_SUFFIXES[:])
            for extension in extensions:
                init_path = os.path.join(path, '__init__' + extension)
                if os.path.exists(init_path):
                    path = init_path
                    break
            else:
                raise ValueError('{!r} is not a package'.format(path))
        spec = util.spec_from_file_location(name, path,
                                            submodule_search_locations=[])
        if name in sys.modules:
            return _exec(spec, sys.modules[name])
        else:
            return _load(spec)

    def load_module(name, file, filename, details):
        """**DEPRECATED**

        Load a module, given information returned by find_module().

        The module name must include the full package name, if any.

        """
        suffix, mode, type_ = details
        if mode and (not mode.startswith('r') or '+' in mode):
            raise ValueError('invalid file open mode {!r}'.format(mode))
        elif file is None and type_ in {PY_SOURCE, PY_COMPILED}:
            msg = 'file object required for import (type code {})'.format(type_)
            raise ValueError(msg)
        elif type_ == PY_SOURCE:
            return load_source(name, filename, file)
        elif type_ == PY_COMPILED:
            return load_compiled(name, filename, file)
        elif type_ == C_EXTENSION and load_dynamic is not None:
            if file is None:
                with open(filename, 'rb') as opened_file:
                    return load_dynamic(name, filename, opened_file)
            else:
                return load_dynamic(name, filename, file)
        elif type_ == PKG_DIRECTORY:
            return load_package(name, filename)
        elif type_ == C_BUILTIN:
            return init_builtin(name)
        elif type_ == PY_FROZEN:
            return init_frozen(name)
        else:
            msg =  "Don't know how to import {} (type code {})".format(name, type_)
            raise ImportError(msg, name=name)

    def find_module(name, path=None):
        """**DEPRECATED**

        Search for a module.

        If path is omitted or None, search for a built-in, frozen or special
        module and continue search in sys.path. The module name cannot
        contain '.'; to search for a submodule of a package, pass the
        submodule name and the package's __path__.

        """
        if not isinstance(name, str):
            raise TypeError("'name' must be a str, not {}".format(type(name)))
        elif not isinstance(path, (type(None), list)):
            # Backwards-compatibility
            raise RuntimeError("'path' must be None or a list, "
                               "not {}".format(type(path)))

        if path is None:
            if is_builtin(name):
                return None, None, ('', '', C_BUILTIN)
            elif is_frozen(name):
                return None, None, ('', '', PY_FROZEN)
            else:
                path = sys.path

        for entry in path:
            package_directory = os.path.join(entry, name)
            for suffix in ['.py', machinery.BYTECODE_SUFFIXES[0]]:
                package_file_name = '__init__' + suffix
                file_path = os.path.join(package_directory, package_file_name)
                if os.path.isfile(file_path):
                    return None, package_directory, ('', '', PKG_DIRECTORY)
            for suffix, mode, type_ in get_suffixes():
                file_name = name + suffix
                file_path = os.path.join(entry, file_name)
                if os.path.isfile(file_path):
                    break
            else:
                continue
            break  # Break out of outer loop when breaking out of inner loop.
        else:
            raise ImportError(_ERR_MSG.format(name), name=name)

        encoding = None
        if 'b' not in mode:
            with open(file_path, 'rb') as file:
                encoding = tokenize.detect_encoding(file.readline)[0]
        file = open(file_path, mode, encoding=encoding)
        return file, file_path, (suffix, mode, type_)

    def reload(module):
        """**DEPRECATED**

        Reload the module and return it.

        The module must have been successfully imported before.

        """
        return importlib.reload(module)

    def init_builtin(name):
        """**DEPRECATED**

        Load and return a built-in module by name, or None is such module doesn't
        exist
        """
        try:
            return _builtin_from_name(name)
        except ImportError:
            return None

    if create_dynamic:
        def load_dynamic(name, path, file=None):
            """**DEPRECATED**

            Load an extension module.
            """
            import importlib.machinery
            loader = importlib.machinery.ExtensionFileLoader(name, path)

            # Issue #24748: Skip the sys.modules check in _load_module_shim;
            # always load new extension
            spec = importlib.machinery.ModuleSpec(
                name=name, loader=loader, origin=path)
            return _load(spec)

    else:
        load_dynamic = None