| """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_builtin, init_frozen, is_builtin, is_frozen, |
| _fix_co_filename) |
| try: |
| from _imp import load_dynamic |
| except ImportError: |
| # Platform doesn't support dynamic loading. |
| load_dynamic = None |
| |
| from importlib._bootstrap import SourcelessFileLoader, _ERR_MSG, _SpecMethods |
| |
| 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; " |
| "see the module's documentation for alternative uses", |
| PendingDeprecationWarning) |
| |
| # 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 or .pyo files. |
| """ |
| return util.MAGIC_NUMBER |
| |
| |
| def get_tag(): |
| """Return the magic tag for .pyc or .pyo 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/.pyo file. |
| |
| The .py file does not need to exist; this simply returns the path to the |
| .pyc/.pyo file calculated as if the .py file were imported. The extension |
| will be .pyc unless sys.flags.optimize is non-zero, then it will be .pyo. |
| |
| 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. |
| |
| """ |
| return util.cache_from_source(path, debug_override) |
| |
| |
| def source_from_cache(path): |
| """**DEPRECATED** |
| |
| Given the path to a .pyc./.pyo file, return the path to its .py file. |
| |
| The .pyc/.pyo file does not need to exist; this simply returns the path to |
| the .py file calculated to correspond to the .pyc/.pyo 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: |
| |
| """Compatibiilty 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: |
| if not self.file.closed: |
| file = self.file |
| else: |
| self.file = file = open(self.path, 'r') |
| |
| with file: |
| # Technically should be returning bytes, but |
| # SourceLoader.get_code() just passed what is returned to |
| # compile() which can handle str. And converting to bytes would |
| # require figuring out the encoding to decode to and |
| # tokenize.detect_encoding() only accepts bytes. |
| 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) |
| methods = _SpecMethods(spec) |
| if name in sys.modules: |
| module = methods.exec(sys.modules[name]) |
| else: |
| module = methods.load() |
| # 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) |
| methods = _SpecMethods(spec) |
| if name in sys.modules: |
| module = methods.exec(sys.modules[name]) |
| else: |
| module = methods.load() |
| # 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: |
| path = os.path.join(path, '__init__'+extension) |
| if os.path.exists(path): |
| break |
| else: |
| raise ValueError('{!r} is not a package'.format(path)) |
| spec = util.spec_from_file_location(name, path, |
| submodule_search_locations=[]) |
| methods = _SpecMethods(spec) |
| if name in sys.modules: |
| return methods.exec(sys.modules[name]) |
| else: |
| return methods.load() |
| |
| |
| 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', 'U')) 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("'list' must be None or a list, " |
| "not {}".format(type(name))) |
| |
| 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) |