python类path_importer_cache()的实例源码

_filefinder2.py 文件源码 项目:filefinder2 作者: asmodehn 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def _path_importer_cache(cls, path):  # from importlib.PathFinder
            """Get the finder for the path entry from sys.path_importer_cache.
            If the path entry is not in the cache, find the appropriate finder
            and cache it. If no finder is available, store None.
            """
            if path == '':
                try:
                    path = os.getcwd()
                except FileNotFoundError:
                    # Don't cache the failure as the cwd can easily change to
                    # a valid directory later on.
                    return None
            try:
                finder = sys.path_importer_cache[path]
            except KeyError:
                finder = cls._path_hooks(path)
                sys.path_importer_cache[path] = finder

            return finder
_filefinder2.py 文件源码 项目:filefinder2 作者: asmodehn 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def find_spec(cls, fullname, path=None, target=None):
            """find the module on sys.path or 'path' based on sys.path_hooks and
            sys.path_importer_cache."""
            if path is None:
                path = sys.path
            spec = cls._get_spec(fullname, path, target)
            if spec is None:
                return None
            elif spec.loader is None:
                namespace_path = spec.submodule_search_locations
                if namespace_path:
                    # We found at least one namespace path.  Return a
                    #  spec which can create the namespace package.
                    spec.origin = 'namespace'
                    spec.submodule_search_locations = _NamespacePath(fullname, namespace_path, cls._get_spec)
                    return spec
                else:
                    return None
            else:
                return spec

    # to match importlib API
_utils.py 文件源码 项目:rosimport 作者: pyros-dev 项目源码 文件源码 阅读 37 收藏 0 点赞 0 评论 0
def print_importers_of(module):
    import sys
    import pprint

    print('MODULE:'),
    pprint.pprint(module)
    mod_path = module.__file__.split(os.sep)
    print()
    print('IMPORTERS USED: {')
    for i in range(len(mod_path)-1):
        parpath = os.sep.join(mod_path[:len(mod_path) - i])
        if parpath in sys.path_importer_cache:
            cached_imp = sys.path_importer_cache[parpath]
            parpath = parpath.replace(sys.prefix, '...')
            print('%s: %r' % (parpath, cached_imp))
    print('}')
__init__.py 文件源码 项目:rosimport 作者: pyros-dev 项目源码 文件源码 阅读 24 收藏 0 点赞 0 评论 0
def activate():
    """Install the path-based import components."""
    # We should plug filefinder first to avoid plugging ROSDirectoryFinder, when it is not a ROS thing...

    filefinder2.activate()

    if ros_path_hook not in sys.path_hooks:
        # We need to be before FileFinder to be able to find our '.msg' and '.srv' files without making a namespace package
        # Note this must be early in the path_hook list, since we change the logic
        # and a namespace package becomes a ros importable package.
        sys.path_hooks.insert(filefinder2.get_filefinder_index_in_path_hooks(), ros_path_hook)

    if ROSPathFinder not in sys.meta_path:
        # adding metahook, before the usual pathfinder, to avoid interferences with python namespace mechanism...
        sys.meta_path.insert(filefinder2.get_pathfinder_index_in_meta_hooks(), ROSPathFinder)

    # Resetting sys.path_importer_cache
    # to support the case where we have an implicit (msg/srv) package inside an already loaded package,
    # since we need to replace the default importer.
    sys.path_importer_cache.clear()
test_path.py 文件源码 项目:zippy 作者: securesystemslab 项目源码 文件源码 阅读 43 收藏 0 点赞 0 评论 0
def test_implicit_hooks(self):
        # Test that the implicit path hooks are used.
        bad_path = '<path>'
        module = '<module>'
        assert not os.path.exists(bad_path)
        existing_path = tempfile.mkdtemp()
        try:
            with util.import_state():
                nothing = _bootstrap._DefaultPathFinder.find_module(module,
                                                        path=[existing_path])
                self.assertTrue(nothing is None)
                self.assertTrue(existing_path in sys.path_importer_cache)
                result = isinstance(sys.path_importer_cache[existing_path],
                                    imp.NullImporter)
                self.assertFalse(result)
                nothing = _bootstrap._DefaultPathFinder.find_module(module,
                                                            path=[bad_path])
                self.assertTrue(nothing is None)
                self.assertTrue(bad_path in sys.path_importer_cache)
                self.assertTrue(isinstance(sys.path_importer_cache[bad_path],
                                           imp.NullImporter))
        finally:
            os.rmdir(existing_path)
test_path.py 文件源码 项目:zippy 作者: securesystemslab 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def test_path_importer_cache_has_None(self):
        # Test that the default hook is used when sys.path_importer_cache
        # contains None for a path.
        module = '<test module>'
        importer = util.mock_modules(module)
        path = '<test path>'
        # XXX Not blackbox.
        original_hook = _bootstrap._DEFAULT_PATH_HOOK
        mock_hook = import_util.mock_path_hook(path, importer=importer)
        _bootstrap._DEFAULT_PATH_HOOK = mock_hook
        try:
            with util.import_state(path_importer_cache={path: None}):
                loader = _bootstrap._DefaultPathFinder.find_module(module,
                                                                    path=[path])
                self.assertTrue(loader is importer)
        finally:
            _bootstrap._DEFAULT_PATH_HOOK = original_hook
test_threaded_import.py 文件源码 项目:zippy 作者: securesystemslab 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def test_parallel_path_hooks(self):
        # Here the Finder instance is only used to check concurrent calls
        # to path_hook().
        finder = Finder()
        # In order for our path hook to be called at each import, we need
        # to flush the path_importer_cache, which we do by registering a
        # dedicated meta_path entry.
        flushing_finder = FlushingFinder()
        def path_hook(path):
            finder.find_module('')
            raise ImportError
        sys.path_hooks.append(path_hook)
        sys.meta_path.append(flushing_finder)
        try:
            # Flush the cache a first time
            flushing_finder.find_module('')
            numtests = self.check_parallel_module_init()
            self.assertGreater(finder.numcalls, 0)
            self.assertEqual(finder.x, finder.numcalls)
        finally:
            sys.meta_path.remove(flushing_finder)
            sys.path_hooks.remove(path_hook)
util.py 文件源码 项目:driveboardapp 作者: nortd 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def _check_importer_for_path(name, path_item):
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                break
            except ImportError:
                pass
        else:
            importer = None
        sys.path_importer_cache.setdefault(path_item, importer)


    if importer is None:
        try:
            return imp.find_module(name, [path_item])
        except ImportError:
            return None
    return importer.find_module(name)
test_threaded_import.py 文件源码 项目:web_ctp 作者: molebot 项目源码 文件源码 阅读 29 收藏 0 点赞 0 评论 0
def test_parallel_path_hooks(self):
        # Here the Finder instance is only used to check concurrent calls
        # to path_hook().
        finder = Finder()
        # In order for our path hook to be called at each import, we need
        # to flush the path_importer_cache, which we do by registering a
        # dedicated meta_path entry.
        flushing_finder = FlushingFinder()
        def path_hook(path):
            finder.find_module('')
            raise ImportError
        sys.path_hooks.insert(0, path_hook)
        sys.meta_path.append(flushing_finder)
        try:
            # Flush the cache a first time
            flushing_finder.find_module('')
            numtests = self.check_parallel_module_init()
            self.assertGreater(finder.numcalls, 0)
            self.assertEqual(finder.x, finder.numcalls)
        finally:
            sys.meta_path.remove(flushing_finder)
            sys.path_hooks.remove(path_hook)
test_api.py 文件源码 项目:web_ctp 作者: molebot 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def test_method_called(self):
        # If defined the method should be called.
        class InvalidatingNullFinder:
            def __init__(self, *ignored):
                self.called = False
            def find_module(self, *args):
                return None
            def invalidate_caches(self):
                self.called = True

        key = 'gobledeegook'
        meta_ins = InvalidatingNullFinder()
        path_ins = InvalidatingNullFinder()
        sys.meta_path.insert(0, meta_ins)
        self.addCleanup(lambda: sys.path_importer_cache.__delitem__(key))
        sys.path_importer_cache[key] = path_ins
        self.addCleanup(lambda: sys.meta_path.remove(meta_ins))
        importlib.invalidate_caches()
        self.assertTrue(meta_ins.called)
        self.assertTrue(path_ins.called)
pkgutil.py 文件源码 项目:ouroboros 作者: pybee 项目源码 文件源码 阅读 23 收藏 0 点赞 0 评论 0
def get_importer(path_item):
    """Retrieve a PEP 302 importer for the given path item

    The returned importer is cached in sys.path_importer_cache
    if it was newly created by a path hook.

    The cache (or part of it) can be cleared manually if a
    rescan of sys.path_hooks is necessary.
    """
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                sys.path_importer_cache.setdefault(path_item, importer)
                break
            except ImportError:
                pass
        else:
            importer = None
    return importer
test_threaded_import.py 文件源码 项目:ouroboros 作者: pybee 项目源码 文件源码 阅读 24 收藏 0 点赞 0 评论 0
def test_parallel_path_hooks(self):
        # Here the Finder instance is only used to check concurrent calls
        # to path_hook().
        finder = Finder()
        # In order for our path hook to be called at each import, we need
        # to flush the path_importer_cache, which we do by registering a
        # dedicated meta_path entry.
        flushing_finder = FlushingFinder()
        def path_hook(path):
            finder.find_spec('')
            raise ImportError
        sys.path_hooks.insert(0, path_hook)
        sys.meta_path.append(flushing_finder)
        try:
            # Flush the cache a first time
            flushing_finder.find_spec('')
            numtests = self.check_parallel_module_init()
            self.assertGreater(finder.numcalls, 0)
            self.assertEqual(finder.x, finder.numcalls)
        finally:
            sys.meta_path.remove(flushing_finder)
            sys.path_hooks.remove(path_hook)
test_api.py 文件源码 项目:ouroboros 作者: pybee 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def test_method_called(self):
        # If defined the method should be called.
        class InvalidatingNullFinder:
            def __init__(self, *ignored):
                self.called = False
            def find_module(self, *args):
                return None
            def invalidate_caches(self):
                self.called = True

        key = 'gobledeegook'
        meta_ins = InvalidatingNullFinder()
        path_ins = InvalidatingNullFinder()
        sys.meta_path.insert(0, meta_ins)
        self.addCleanup(lambda: sys.path_importer_cache.__delitem__(key))
        sys.path_importer_cache[key] = path_ins
        self.addCleanup(lambda: sys.meta_path.remove(meta_ins))
        self.init.invalidate_caches()
        self.assertTrue(meta_ins.called)
        self.assertTrue(path_ins.called)
test_path.py 文件源码 项目:ouroboros 作者: pybee 项目源码 文件源码 阅读 34 收藏 0 点赞 0 评论 0
def test_None_on_sys_path(self):
        # Putting None in sys.path[0] caused an import regression from Python
        # 3.2: http://bugs.python.org/issue16514
        new_path = sys.path[:]
        new_path.insert(0, None)
        new_path_importer_cache = sys.path_importer_cache.copy()
        new_path_importer_cache.pop(None, None)
        new_path_hooks = [zipimport.zipimporter,
                          self.machinery.FileFinder.path_hook(
                              *self.importlib._bootstrap._get_supported_file_loaders())]
        missing = object()
        email = sys.modules.pop('email', missing)
        try:
            with util.import_state(meta_path=sys.meta_path[:],
                                   path=new_path,
                                   path_importer_cache=new_path_importer_cache,
                                   path_hooks=new_path_hooks):
                module = self.importlib.import_module('email')
                self.assertIsInstance(module, ModuleType)
        finally:
            if email is not missing:
                sys.modules['email'] = email
pkgutil.py 文件源码 项目:kbe_server 作者: xiaohaoppy 项目源码 文件源码 阅读 29 收藏 0 点赞 0 评论 0
def get_importer(path_item):
    """Retrieve a PEP 302 importer for the given path item

    The returned importer is cached in sys.path_importer_cache
    if it was newly created by a path hook.

    The cache (or part of it) can be cleared manually if a
    rescan of sys.path_hooks is necessary.
    """
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                sys.path_importer_cache.setdefault(path_item, importer)
                break
            except ImportError:
                pass
        else:
            importer = None
    return importer
test_threaded_import.py 文件源码 项目:kbe_server 作者: xiaohaoppy 项目源码 文件源码 阅读 25 收藏 0 点赞 0 评论 0
def test_parallel_path_hooks(self):
        # Here the Finder instance is only used to check concurrent calls
        # to path_hook().
        finder = Finder()
        # In order for our path hook to be called at each import, we need
        # to flush the path_importer_cache, which we do by registering a
        # dedicated meta_path entry.
        flushing_finder = FlushingFinder()
        def path_hook(path):
            finder.find_spec('')
            raise ImportError
        sys.path_hooks.insert(0, path_hook)
        sys.meta_path.append(flushing_finder)
        try:
            # Flush the cache a first time
            flushing_finder.find_spec('')
            numtests = self.check_parallel_module_init()
            self.assertGreater(finder.numcalls, 0)
            self.assertEqual(finder.x, finder.numcalls)
        finally:
            sys.meta_path.remove(flushing_finder)
            sys.path_hooks.remove(path_hook)
test_path.py 文件源码 项目:kbe_server 作者: xiaohaoppy 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def test_None_on_sys_path(self):
        # Putting None in sys.path[0] caused an import regression from Python
        # 3.2: http://bugs.python.org/issue16514
        new_path = sys.path[:]
        new_path.insert(0, None)
        new_path_importer_cache = sys.path_importer_cache.copy()
        new_path_importer_cache.pop(None, None)
        new_path_hooks = [zipimport.zipimporter,
                          self.machinery.FileFinder.path_hook(
                              *self.importlib._bootstrap._get_supported_file_loaders())]
        missing = object()
        email = sys.modules.pop('email', missing)
        try:
            with util.import_state(meta_path=sys.meta_path[:],
                                   path=new_path,
                                   path_importer_cache=new_path_importer_cache,
                                   path_hooks=new_path_hooks):
                module = self.importlib.import_module('email')
                self.assertIsInstance(module, ModuleType)
        finally:
            if email is not missing:
                sys.modules['email'] = email
util.py 文件源码 项目:mac-package-build 作者: persepolisdm 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def _check_importer_for_path(name, path_item):
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                break
            except ImportError:
                pass
        else:
            importer = None
        sys.path_importer_cache.setdefault(path_item, importer)


    if importer is None:
        try:
            return imp.find_module(name, [path_item])
        except ImportError:
            return None
    return importer.find_module(name)
runpy.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def _get_importer(path_name):
    """Python version of PyImport_GetImporter C API function"""
    cache = sys.path_importer_cache
    try:
        importer = cache[path_name]
    except KeyError:
        # Not yet cached. Flag as using the
        # standard machinery until we finish
        # checking the hooks
        cache[path_name] = None
        for hook in sys.path_hooks:
            try:
                importer = hook(path_name)
                break
            except ImportError:
                pass
        else:
            # The following check looks a bit odd. The trick is that
            # NullImporter throws ImportError if the supplied path is a
            # *valid* directory entry (and hence able to be handled
            # by the standard import machinery)
            try:
                importer = imp.NullImporter(path_name)
            except ImportError:
                return None
        cache[path_name] = importer
    return importer
pkgutil.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 31 收藏 0 点赞 0 评论 0
def get_importer(path_item):
    """Retrieve a PEP 302 importer for the given path item

    The returned importer is cached in sys.path_importer_cache
    if it was newly created by a path hook.

    If there is no importer, a wrapper around the basic import
    machinery is returned. This wrapper is never inserted into
    the importer cache (None is inserted instead).

    The cache (or part of it) can be cleared manually if a
    rescan of sys.path_hooks is necessary.
    """
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                break
            except ImportError:
                pass
        else:
            importer = None
        sys.path_importer_cache.setdefault(path_item, importer)

    if importer is None:
        try:
            importer = ImpImporter(path_item)
        except ImportError:
            importer = None
    return importer
easy_install.py 文件源码 项目:Flask_Blog 作者: sugarguo 项目源码 文件源码 阅读 39 收藏 0 点赞 0 评论 0
def uncache_zipdir(path):
    """Ensure that the importer caches dont have stale info for `path`"""
    from zipimport import _zip_directory_cache as zdc
    _uncache(path, zdc)
    _uncache(path, sys.path_importer_cache)
runpy.py 文件源码 项目:hostapd-mana 作者: adde88 项目源码 文件源码 阅读 27 收藏 0 点赞 0 评论 0
def _get_importer(path_name):
    """Python version of PyImport_GetImporter C API function"""
    cache = sys.path_importer_cache
    try:
        importer = cache[path_name]
    except KeyError:
        # Not yet cached. Flag as using the
        # standard machinery until we finish
        # checking the hooks
        cache[path_name] = None
        for hook in sys.path_hooks:
            try:
                importer = hook(path_name)
                break
            except ImportError:
                pass
        else:
            # The following check looks a bit odd. The trick is that
            # NullImporter raises ImportError if the supplied path is a
            # *valid* directory entry (and hence able to be handled
            # by the standard import machinery)
            try:
                importer = imp.NullImporter(path_name)
            except ImportError:
                return None
        cache[path_name] = importer
    return importer
modules.py 文件源码 项目:hostapd-mana 作者: adde88 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def _findEntryPathString(self, modobj):
        """
        Determine where a given Python module object came from by looking at path
        entries.
        """
        topPackageObj = modobj
        while '.' in topPackageObj.__name__:
            topPackageObj = self.moduleDict['.'.join(
                    topPackageObj.__name__.split('.')[:-1])]
        if _isPackagePath(FilePath(topPackageObj.__file__)):
            # if package 'foo' is on sys.path at /a/b/foo, package 'foo's
            # __file__ will be /a/b/foo/__init__.py, and we are looking for
            # /a/b here, the path-entry; so go up two steps.
            rval = dirname(dirname(topPackageObj.__file__))
        else:
            # the module is completely top-level, not within any packages.  The
            # path entry it's on is just its dirname.
            rval = dirname(topPackageObj.__file__)
        # There are probably some awful tricks that an importer could pull
        # which would break this, so let's just make sure... it's a loaded
        # module after all, which means that its path MUST be in
        # path_importer_cache according to PEP 302 -glyph
        from pprint import pformat
        assert rval in self.importerCache, '%r for %r not in import cache %s' % (
            rval, modobj, pformat(self.importerCache))
        return rval
pkgutil.py 文件源码 项目:hostapd-mana 作者: adde88 项目源码 文件源码 阅读 50 收藏 0 点赞 0 评论 0
def get_importer(path_item):
    """Retrieve a PEP 302 importer for the given path item

    The returned importer is cached in sys.path_importer_cache
    if it was newly created by a path hook.

    If there is no importer, a wrapper around the basic import
    machinery is returned. This wrapper is never inserted into
    the importer cache (None is inserted instead).

    The cache (or part of it) can be cleared manually if a
    rescan of sys.path_hooks is necessary.
    """
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                break
            except ImportError:
                pass
        else:
            importer = None
        sys.path_importer_cache.setdefault(path_item, importer)

    if importer is None:
        try:
            importer = ImpImporter(path_item)
        except ImportError:
            importer = None
    return importer
stateMachine2.py 文件源码 项目:cpyparsing 作者: evhub 项目源码 文件源码 阅读 29 收藏 0 点赞 0 评论 0
def checkpath_iter(self, fullname):
        for dirpath in sys.path:
            # if the value in sys.path_importer_cache is None, then this
            # path *should* be imported by the builtin mechanism, and the
            # entry is thus a path to a directory on the filesystem;
            # if it's not None, then some other importer is in charge, and
            # it probably isn't even a filesystem path
            if sys.path_importer_cache.get(dirpath,False) is None:
                checkpath = os.path.join(
                        dirpath,'%s.%s' % (fullname,self.suffix))
                yield checkpath
Red-GUI.py 文件源码 项目:Red-GUI 作者: ScarletRav3n 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def verify_requirements():
    sys.path_importer_cache = {}  # I don't know if the cache reset has any
    basic = find_spec("discord")  # side effect. Without it, the lib folder
    audio = find_spec("nacl")     # wouldn't be seen if it didn't exist
    if not basic:                 # when the launcher was started
        return None
    elif not audio:
        return False
    else:
        return True
_filefinder2.py 文件源码 项目:filefinder2 作者: asmodehn 项目源码 文件源码 阅读 25 收藏 0 点赞 0 评论 0
def invalidate_caches(cls):
            """Call the invalidate_caches() method on all path entry finders
            stored in sys.path_importer_caches (where implemented)."""
            for finder in sys.path_importer_cache.values():
                if hasattr(finder, 'invalidate_caches'):
                    finder.invalidate_caches()
_filefinder2.py 文件源码 项目:filefinder2 作者: asmodehn 项目源码 文件源码 阅读 29 收藏 0 点赞 0 评论 0
def find_module(cls, fullname, path=None):
            """find the module on sys.path or 'path' based on sys.path_hooks and
            sys.path_importer_cache.
            This method is for python2 only
            """
            spec = cls.find_spec(fullname, path)
            if spec is None:
                return None
            elif spec.loader is None and spec.submodule_search_locations:
                # Here we need to create a namespace loader to handle namespaces since python2 doesn't...
                return NamespaceLoader2(spec.name, spec.submodule_search_locations)
            else:
                return spec.loader
_filefinder2.py 文件源码 项目:filefinder2 作者: asmodehn 项目源码 文件源码 阅读 25 收藏 0 点赞 0 评论 0
def activate():
        """Install the path-based import components."""
        if path_hook not in sys.path_hooks:
            sys.path_hooks.append(path_hook)
        # Resetting sys.path_importer_cache values,
        # to support the case where we have an implicit package inside an already loaded package,
        # since we need to replace the default importer.
        sys.path_importer_cache.clear()

        if PathFinder2 not in sys.meta_path:
            # Setting up the meta_path to change package finding logic
            sys.meta_path.append(PathFinder2)
pkgutil.py 文件源码 项目:mitogen 作者: dw 项目源码 文件源码 阅读 37 收藏 0 点赞 0 评论 0
def get_importer(path_item):
    """Retrieve a PEP 302 importer for the given path item

    The returned importer is cached in sys.path_importer_cache
    if it was newly created by a path hook.

    If there is no importer, a wrapper around the basic import
    machinery is returned. This wrapper is never inserted into
    the importer cache (None is inserted instead).

    The cache (or part of it) can be cleared manually if a
    rescan of sys.path_hooks is necessary.
    """
    try:
        importer = sys.path_importer_cache[path_item]
    except KeyError:
        for path_hook in sys.path_hooks:
            try:
                importer = path_hook(path_item)
                break
            except ImportError:
                pass
        else:
            importer = None
        sys.path_importer_cache.setdefault(path_item, importer)

    if importer is None:
        try:
            importer = ImpImporter(path_item)
        except ImportError:
            importer = None
    return importer


问题


面经


文章

微信
公众号

扫码关注公众号