flake8 and forward ref fixes

Author: Yobmod

git/compat/compat.py

@@ -48,7 +48,8 @@
 
 # invariants
 # represents the configuration level of a configuration file
-CONFIG_LEVELS = ("system", "user", "global", "repository")  # type: Tuple[Literal['system'], Literal['user'], Literal['global'], Literal['repository']]
+CONFIG_LEVELS = ("system", "user", "global", "repository"
+                 )  # type: Tuple[Literal['system'], Literal['user'], Literal['global'], Literal['repository']]
 
 # Section pattern to detect conditional includes.
 # https://git-scm.com/docs/git-config#_conditional_includes

git/config.py

@@ -36,7 +36,7 @@
 
 # typing-------------------------------------------------------
 
-from typing import Any, Callable, Dict, Iterator, List, Optional, TYPE_CHECKING, Union, cast, overload
+from typing import Any, Callable, Dict, Iterator, List, Optional, Sequence, TYPE_CHECKING, Union, cast, overload
 
 from git.types import PathLike, Literal, TBD
 
@@ -277,7 +277,7 @@ def refresh(cls) -> Literal[True]:
         return True
 
     def __init__(self, ref: SymbolicReference, flags: int, note: str = '',
-                 old_commit: Union[Commit, TagReference, Tree, Blob, None] = None,
+                 old_commit: Union['Commit', TagReference, 'Tree', 'Blob', None] = None,
                  remote_ref_path: Optional[PathLike] = None) -> None:
         """
         Initialize a new instance
@@ -816,12 +816,11 @@ def fetch(self, refspec: Union[str, List[str], None] = None,
         if refspec is None:
             # No argument refspec, then ensure the repo's config has a fetch refspec.
             self._assert_refspec()
-        assert refspec is not None  # for typing
+
         kwargs = add_progress(kwargs, self.repo.git, progress)
         if isinstance(refspec, list):
-            args = refspec
+            args = refspec  # type: Sequence[Optional[str]]  # should need this - check logic for passing None through
         else:
-            
             args = [refspec]
 
         proc = self.repo.git.fetch(self, *args, as_process=True, with_stdout=False,

git/remote.py

@@ -4,7 +4,6 @@
 # This module is part of GitPython and is released under
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
 
-from _typeshed import StrPath
 import logging
 import os
 import re

git/repo/base.py

@@ -996,7 +996,8 @@ def list_items(cls, repo: 'Repo', *args: Any, **kwargs: Any) -> 'IterableList':
         return out_list
 
     @classmethod
-    def iter_items(cls, repo: 'Repo', *args: Any, **kwargs: Any) -> Iterator[TBD]:  # type to be compatible with subtypes e.g. Remote
+    def iter_items(cls, repo: 'Repo', *args: Any, **kwargs: Any) -> Iterator[TBD]:
+        # return typed to be compatible with subtypes e.g. Remote
         """For more information about the arguments, see list_items
         :return:  iterator yielding Items"""
         raise NotImplementedError("To be implemented by Subclass")