diff options
Diffstat (limited to 'Lib/imp.py')
| -rw-r--r-- | Lib/imp.py | 194 |
1 files changed, 105 insertions, 89 deletions
diff --git a/Lib/imp.py b/Lib/imp.py index 40869f5ac0..458d3702fe 100644 --- a/Lib/imp.py +++ b/Lib/imp.py @@ -12,22 +12,24 @@ from _imp import (lock_held, acquire_lock, release_lock, _fix_co_filename) try: from _imp import load_dynamic -except ImportError: +except ModuleNotFoundError: # Platform doesn't support dynamic loading. load_dynamic = None -# Directly exposed by this module -from importlib._bootstrap import new_module -from importlib._bootstrap import cache_from_source, source_from_cache +from importlib._bootstrap import SourcelessFileLoader, _ERR_MSG - -from importlib import _bootstrap 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 @@ -42,9 +44,23 @@ 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(): - """Return the magic number for .pyc or .pyo files.""" - return _bootstrap._MAGIC_BYTES + """**DEPRECATED** + + Return the magic number for .pyc or .pyo files. + """ + return util.MAGIC_NUMBER def get_tag(): @@ -52,10 +68,40 @@ def get_tag(): 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(): - warnings.warn('imp.get_suffixes() is deprecated; use the constants ' - 'defined on importlib.machinery instead', - DeprecationWarning, 2) + """**DEPRECATED**""" extensions = [(s, 'rb', C_EXTENSION) for s in machinery.EXTENSION_SUFFIXES] source = [(s, 'U', PY_SOURCE) for s in machinery.SOURCE_SUFFIXES] bytecode = [(s, 'rb', PY_COMPILED) for s in machinery.BYTECODE_SUFFIXES] @@ -65,7 +111,11 @@ def get_suffixes(): class NullImporter: - """Null import object.""" + """**DEPRECATED** + + Null import object. + + """ def __init__(self, path): if path == '': @@ -101,48 +151,37 @@ class _HackedGetData: return super().get_data(path) -class _LoadSourceCompatibility(_HackedGetData, _bootstrap.SourceFileLoader): +class _LoadSourceCompatibility(_HackedGetData, machinery.SourceFileLoader): """Compatibility support for implementing load_source().""" def load_source(name, pathname, file=None): - msg = ('imp.load_source() is deprecated; use ' - 'importlib.machinery.SourceFileLoader(name, pathname).load_module()' - ' instead') - warnings.warn(msg, DeprecationWarning, 2) _LoadSourceCompatibility(name, pathname, file).load_module(name) module = sys.modules[name] # To allow reloading to potentially work, use a non-hacked loader which # won't rely on a now-closed file object. - module.__loader__ = _bootstrap.SourceFileLoader(name, pathname) + module.__loader__ = machinery.SourceFileLoader(name, pathname) return module -class _LoadCompiledCompatibility(_HackedGetData, - _bootstrap.SourcelessFileLoader): +class _LoadCompiledCompatibility(_HackedGetData, SourcelessFileLoader): """Compatibility support for implementing load_compiled().""" def load_compiled(name, pathname, file=None): - msg = ('imp.load_compiled() is deprecated; use ' - 'importlib.machinery.SourcelessFileLoader(name, pathname).' - 'load_module() instead ') - warnings.warn(msg, DeprecationWarning, 2) + """**DEPRECATED**""" _LoadCompiledCompatibility(name, pathname, file).load_module(name) module = sys.modules[name] # To allow reloading to potentially work, use a non-hacked loader which # won't rely on a now-closed file object. - module.__loader__ = _bootstrap.SourcelessFileLoader(name, pathname) + module.__loader__ = SourcelessFileLoader(name, pathname) return module def load_package(name, path): - msg = ('imp.load_package() is deprecated; use either ' - 'importlib.machinery.SourceFileLoader() or ' - 'importlib.machinery.SourcelessFileLoader() instead') - warnings.warn(msg, DeprecationWarning, 2) + """**DEPRECATED**""" if os.path.isdir(path): extensions = (machinery.SOURCE_SUFFIXES[:] + machinery.BYTECODE_SUFFIXES[:]) @@ -152,7 +191,7 @@ def load_package(name, path): break else: raise ValueError('{!r} is not a package'.format(path)) - return _bootstrap.SourceFileLoader(name, path).load_module(name) + return machinery.SourceFileLoader(name, path).load_module(name) def load_module(name, file, filename, details): @@ -164,32 +203,30 @@ def load_module(name, file, filename, details): """ suffix, mode, type_ = details - with warnings.catch_warnings(): - warnings.simplefilter('ignore') - 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) + 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: - msg = "Don't know how to import {} (type code {})".format(name, type_) - raise ImportError(msg, name=name) + 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): @@ -225,18 +262,16 @@ def find_module(name, path=None): file_path = os.path.join(package_directory, package_file_name) if os.path.isfile(file_path): return None, package_directory, ('', '', PKG_DIRECTORY) - with warnings.catch_warnings(): - warnings.simplefilter('ignore') - 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. + 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(_bootstrap._ERR_MSG.format(name), name=name) + raise ImportError(_ERR_MSG.format(name), name=name) encoding = None if mode == 'U': @@ -246,31 +281,12 @@ def find_module(name, path=None): return file, file_path, (suffix, mode, type_) -_RELOADING = {} - def reload(module): - """Reload the module and return it. + """**DEPRECATED** + + Reload the module and return it. The module must have been successfully imported before. """ - if not module or type(module) != type(sys): - raise TypeError("reload() argument must be module") - name = module.__name__ - if name not in sys.modules: - msg = "module {} not in sys.modules" - raise ImportError(msg.format(name), name=name) - if name in _RELOADING: - return _RELOADING[name] - _RELOADING[name] = module - try: - parent_name = name.rpartition('.')[0] - if parent_name and parent_name not in sys.modules: - msg = "parent {!r} not in sys.modules" - raise ImportError(msg.format(parentname), name=parent_name) - return module.__loader__.load_module(name) - finally: - try: - del _RELOADING[name] - except KeyError: - pass + return importlib.reload(module) |