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Make utility code in importlib._bootstrap private.

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Brett Cannon 2009-03-12 22:07:17 +00:00
parent 9495f182a0
commit 3eeaa0a821
1 changed files with 32 additions and 32 deletions
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64
Lib/importlib/_bootstrap.py
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@ -56,7 +56,7 @@ def _path_isdir(path):
def _path_without_ext(path, ext_type): def _path_without_ext(path, ext_type):
"""Replacement for os.path.splitext()[0].""" """Replacement for os.path.splitext()[0]."""
for suffix in suffix_list(ext_type): for suffix in _suffix_list(ext_type):
if path.endswith(suffix): if path.endswith(suffix):
return path[:-len(suffix)] return path[:-len(suffix)]
else: else:
@ -76,7 +76,7 @@ def _path_absolute(path):
return _path_join(_os.getcwd(), path) return _path_join(_os.getcwd(), path)
class closing: class _closing:
"""Simple replacement for contextlib.closing.""" """Simple replacement for contextlib.closing."""
@ -90,7 +90,7 @@ class closing:
self.obj.close() self.obj.close()
def wrap(new, old): def _wrap(new, old):
"""Simple substitute for functools.wraps.""" """Simple substitute for functools.wraps."""
for replace in ['__module__', '__name__', '__doc__']: for replace in ['__module__', '__name__', '__doc__']:
setattr(new, replace, getattr(old, replace)) setattr(new, replace, getattr(old, replace))
@ -106,7 +106,7 @@ def set_package(fxn):
if not hasattr(module, '__path__'): if not hasattr(module, '__path__'):
module.__package__ = module.__package__.rpartition('.')[0] module.__package__ = module.__package__.rpartition('.')[0]
return module return module
wrap(wrapper, fxn) _wrap(wrapper, fxn)
return wrapper return wrapper
@ -117,7 +117,7 @@ def set_loader(fxn):
if not hasattr(module, '__loader__'): if not hasattr(module, '__loader__'):
module.__loader__ = self module.__loader__ = self
return module return module
wrap(wrapper, fxn) _wrap(wrapper, fxn)
return wrapper return wrapper
@ -187,7 +187,7 @@ class FrozenImporter:
raise raise
def chained_path_hook(*path_hooks): def _chained_path_hook(*path_hooks):
"""Create a closure which sequentially checks path hooks to see which ones """Create a closure which sequentially checks path hooks to see which ones
(if any) can work with a path.""" (if any) can work with a path."""
def path_hook(entry): def path_hook(entry):
@ -203,12 +203,12 @@ def chained_path_hook(*path_hooks):
if not finders: if not finders:
raise ImportError("no finder found") raise ImportError("no finder found")
else: else:
return ChainedFinder(*finders) return _ChainedFinder(*finders)
return path_hook return path_hook
class ChainedFinder: class _ChainedFinder:
"""Finder that sequentially calls other finders.""" """Finder that sequentially calls other finders."""
@ -224,7 +224,7 @@ class ChainedFinder:
return None return None
def check_name(method): def _check_name(method):
"""Decorator to verify that the module being requested matches the one the """Decorator to verify that the module being requested matches the one the
loader can handle. loader can handle.
@ -236,7 +236,7 @@ def check_name(method):
if self._name != name: if self._name != name:
raise ImportError("loader cannot handle %s" % name) raise ImportError("loader cannot handle %s" % name)
return method(self, name, *args, **kwargs) return method(self, name, *args, **kwargs)
wrap(inner, method) _wrap(inner, method)
return inner return inner
@ -260,7 +260,7 @@ class _ExtensionFileLoader:
if is_pkg: if is_pkg:
raise ValueError("extension modules cannot be packages") raise ValueError("extension modules cannot be packages")
@check_name @_check_name
@set_package @set_package
@set_loader @set_loader
def load_module(self, fullname): def load_module(self, fullname):
@ -273,23 +273,23 @@ class _ExtensionFileLoader:
del sys.modules[fullname] del sys.modules[fullname]
raise raise
@check_name @_check_name
def is_package(self, fullname): def is_package(self, fullname):
"""Return False as an extension module can never be a package.""" """Return False as an extension module can never be a package."""
return False return False
@check_name @_check_name
def get_code(self, fullname): def get_code(self, fullname):
"""Return None as an extension module cannot create a code object.""" """Return None as an extension module cannot create a code object."""
return None return None
@check_name @_check_name
def get_source(self, fullname): def get_source(self, fullname):
"""Return None as extension modules have no source code.""" """Return None as extension modules have no source code."""
return None return None
def suffix_list(suffix_type): def _suffix_list(suffix_type):
"""Return a list of file suffixes based on the imp file type.""" """Return a list of file suffixes based on the imp file type."""
return [suffix[0] for suffix in imp.get_suffixes() return [suffix[0] for suffix in imp.get_suffixes()
if suffix[2] == suffix_type] if suffix[2] == suffix_type]
@ -323,7 +323,7 @@ def module_for_loader(fxn):
if not is_reload: if not is_reload:
del sys.modules[fullname] del sys.modules[fullname]
raise raise
wrap(decorated, fxn) _wrap(decorated, fxn)
return decorated return decorated
@ -484,21 +484,21 @@ class PyFileLoader(PyLoader):
def _find_path(self, ext_type): def _find_path(self, ext_type):
"""Find a path from the base path and the specified extension type that """Find a path from the base path and the specified extension type that
exists, returning None if one is not found.""" exists, returning None if one is not found."""
for suffix in suffix_list(ext_type): for suffix in _suffix_list(ext_type):
path = self._base_path + suffix path = self._base_path + suffix
if _path_exists(path): if _path_exists(path):
return path return path
else: else:
return None return None
@check_name @_check_name
def source_path(self, fullname): def source_path(self, fullname):
"""Return the path to an existing source file for the module, or None """Return the path to an existing source file for the module, or None
if one cannot be found.""" if one cannot be found."""
# Not a property so that it is easy to override. # Not a property so that it is easy to override.
return self._find_path(imp.PY_SOURCE) return self._find_path(imp.PY_SOURCE)
@check_name @_check_name
def get_source(self, fullname): def get_source(self, fullname):
"""Return the source for the module as a string. """Return the source for the module as a string.
@ -510,7 +510,7 @@ class PyFileLoader(PyLoader):
if source_path is None: if source_path is None:
return None return None
import tokenize import tokenize
with closing(_io.FileIO(source_path, 'r')) as file: # Assuming bytes. with _closing(_io.FileIO(source_path, 'r')) as file: # Assuming bytes.
encoding, lines = tokenize.detect_encoding(file.readline) encoding, lines = tokenize.detect_encoding(file.readline)
# XXX Will fail when passed to compile() if the encoding is # XXX Will fail when passed to compile() if the encoding is
# anything other than UTF-8. # anything other than UTF-8.
@ -521,7 +521,7 @@ class PyFileLoader(PyLoader):
"""Return the data from path as raw bytes.""" """Return the data from path as raw bytes."""
return _io.FileIO(path, 'r').read() # Assuming bytes. return _io.FileIO(path, 'r').read() # Assuming bytes.
@check_name @_check_name
def is_package(self, fullname): def is_package(self, fullname):
"""Return a boolean based on whether the module is a package. """Return a boolean based on whether the module is a package.
@ -536,7 +536,7 @@ class PyPycFileLoader(PyPycLoader, PyFileLoader):
"""Load a module from a source or bytecode file.""" """Load a module from a source or bytecode file."""
@check_name @_check_name
def source_mtime(self, name): def source_mtime(self, name):
"""Return the modification time of the source for the specified """Return the modification time of the source for the specified
module.""" module."""
@ -545,14 +545,14 @@ class PyPycFileLoader(PyPycLoader, PyFileLoader):
return None return None
return int(_os.stat(source_path).st_mtime) return int(_os.stat(source_path).st_mtime)
@check_name @_check_name
def bytecode_path(self, fullname): def bytecode_path(self, fullname):
"""Return the path to a bytecode file, or None if one does not """Return the path to a bytecode file, or None if one does not
exist.""" exist."""
# Not a property for easy overriding. # Not a property for easy overriding.
return self._find_path(imp.PY_COMPILED) return self._find_path(imp.PY_COMPILED)
@check_name @_check_name
def write_bytecode(self, name, data): def write_bytecode(self, name, data):
"""Write out 'data' for the specified module, returning a boolean """Write out 'data' for the specified module, returning a boolean
signifying if the write-out actually occurred. signifying if the write-out actually occurred.
@ -563,10 +563,10 @@ class PyPycFileLoader(PyPycLoader, PyFileLoader):
""" """
bytecode_path = self.bytecode_path(name) bytecode_path = self.bytecode_path(name)
if not bytecode_path: if not bytecode_path:
bytecode_path = self._base_path + suffix_list(imp.PY_COMPILED)[0] bytecode_path = self._base_path + _suffix_list(imp.PY_COMPILED)[0]
file = _io.FileIO(bytecode_path, 'w') # Assuming bytes. file = _io.FileIO(bytecode_path, 'w') # Assuming bytes.
try: try:
with closing(file) as bytecode_file: with _closing(file) as bytecode_file:
bytecode_file.write(data) bytecode_file.write(data)
return True return True
except IOError as exc: except IOError as exc:
@ -645,7 +645,7 @@ class ExtensionFileFinder(FileFinder):
def __init__(self, path_entry): def __init__(self, path_entry):
# Assigning to _suffixes here instead of at the class level because # Assigning to _suffixes here instead of at the class level because
# imp is not imported at the time of class creation. # imp is not imported at the time of class creation.
self._suffixes = suffix_list(imp.C_EXTENSION) self._suffixes = _suffix_list(imp.C_EXTENSION)
super().__init__(path_entry) super().__init__(path_entry)
@ -660,7 +660,7 @@ class PyFileFinder(FileFinder):
# Lack of imp during class creation means _suffixes is set here. # Lack of imp during class creation means _suffixes is set here.
# Make sure that Python source files are listed first! Needed for an # Make sure that Python source files are listed first! Needed for an
# optimization by the loader. # optimization by the loader.
self._suffixes = suffix_list(imp.PY_SOURCE) self._suffixes = _suffix_list(imp.PY_SOURCE)
super().__init__(path_entry) super().__init__(path_entry)
@ -672,7 +672,7 @@ class PyPycFileFinder(PyFileFinder):
def __init__(self, path_entry): def __init__(self, path_entry):
super().__init__(path_entry) super().__init__(path_entry)
self._suffixes += suffix_list(imp.PY_COMPILED) self._suffixes += _suffix_list(imp.PY_COMPILED)
class PathFinder: class PathFinder:
@ -738,7 +738,7 @@ class PathFinder:
return None return None
_DEFAULT_PATH_HOOK = chained_path_hook(ExtensionFileFinder, PyPycFileFinder) _DEFAULT_PATH_HOOK = _chained_path_hook(ExtensionFileFinder, PyPycFileFinder)
class _DefaultPathFinder(PathFinder): class _DefaultPathFinder(PathFinder):
@ -761,7 +761,7 @@ class _DefaultPathFinder(PathFinder):
return super()._path_importer_cache(path, _DEFAULT_PATH_HOOK) return super()._path_importer_cache(path, _DEFAULT_PATH_HOOK)
class ImportLockContext: class _ImportLockContext:
"""Context manager for the import lock.""" """Context manager for the import lock."""
@ -806,7 +806,7 @@ def _gcd_import(name, package=None, level=0):
name = "{0}.{1}".format(package[:dot], name) name = "{0}.{1}".format(package[:dot], name)
else: else:
name = package[:dot] name = package[:dot]
with ImportLockContext(): with _ImportLockContext():
try: try:
return sys.modules[name] return sys.modules[name]
except KeyError: except KeyError: