bpo-41006: importlib.util no longer imports typing (GH-20938)

Create importlib._abc submodule to avoid importing typing when
importlib.util is imported. Move Loader ABC into importlib._abc.

1 files changed, 1 insertions, 47 deletions

diff --git a/Lib/importlib/abc.py b/Lib/importlib/abc.py
index 0b20e7c13f..97d5afa300 100644
--- a/Lib/importlib/abc.py
+++ b/Lib/importlib/abc.py
@@ -12,6 +12,7 @@ try:
     import _frozen_importlib_external
 except ImportError:
     _frozen_importlib_external = _bootstrap_external
+from ._abc import Loader
 import abc
 import warnings
 from typing import Protocol, runtime_checkable
@@ -134,53 +135,6 @@ class PathEntryFinder(Finder):
 _register(PathEntryFinder, machinery.FileFinder)
 
 
-class Loader(metaclass=abc.ABCMeta):
-
-    """Abstract base class for import loaders."""
-
-    def create_module(self, spec):
-        """Return a module to initialize and into which to load.
-
-        This method should raise ImportError if anything prevents it
-        from creating a new module.  It may return None to indicate
-        that the spec should create the new module.
-        """
-        # By default, defer to default semantics for the new module.
-        return None
-
-    # We don't define exec_module() here since that would break
-    # hasattr checks we do to support backward compatibility.
-
-    def load_module(self, fullname):
-        """Return the loaded module.
-
-        The module must be added to sys.modules and have import-related
-        attributes set properly.  The fullname is a str.
-
-        ImportError is raised on failure.
-
-        This method is deprecated in favor of loader.exec_module(). If
-        exec_module() exists then it is used to provide a backwards-compatible
-        functionality for this method.
-
-        """
-        if not hasattr(self, 'exec_module'):
-            raise ImportError
-        return _bootstrap._load_module_shim(self, fullname)
-
-    def module_repr(self, module):
-        """Return a module's repr.
-
-        Used by the module type when the method does not raise
-        NotImplementedError.
-
-        This method is deprecated.
-
-        """
-        # The exception will cause ModuleType.__repr__ to ignore this method.
-        raise NotImplementedError
-
-
 class ResourceLoader(Loader):
 
     """Abstract base class for loaders which can return data from their