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- @classmethod
- def _get_spec(cls, fullname, path, target=None):
- """Find the loader or namespace_path for this module/package name."""
- # If this ends up being a namespace package, namespace_path is
- # the list of paths that will become its __path__
- namespace_path = []
- for entry in path:
- if not isinstance(entry, (str, bytes)):
- continue
- finder = cls._path_importer_cache(entry)
- if finder is not None:
- if hasattr(finder, 'find_spec'):
- spec = finder.find_spec(fullname, target)
- else:
- spec = cls._legacy_get_spec(fullname, finder)
- if spec is None:
- continue
- if spec.loader is not None:
- return spec
- portions = spec.submodule_search_locations
- if portions is None:
- raise ImportError('spec missing loader')
- # This is possibly part of a namespace package.
- # Remember these path entries (if any) for when we
- # create a namespace package, and continue iterating
- # on path.
- namespace_path.extend(portions)
- else:
- spec = _bootstrap.ModuleSpec(fullname, None)
- spec.submodule_search_locations = namespace_path
- return spec
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