import sys from typing import Any, Dict if sys.version_info >= (3, 8): from typing import Literal, TypedDict else: # avoid runtime dependency on typing_extensions on py37 try: from typing_extensions import Literal, TypedDict # type: ignore except ImportError: class _Literal: def __getitem__(self, key): return Any Literal = _Literal() # type: ignore class TypedDict(Dict): # type: ignore pass