cpython/Lib/test/mod_generics_cache.py

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"""Module for testing the behavior of generics across different modules."""
from typing import TypeVar, Generic, Optional, TypeAliasType
default_a: Optional['A'] = None
default_b: Optional['B'] = None
T = TypeVar('T')
class A(Generic[T]):
some_b: 'B'
class B(Generic[T]):
class A(Generic[T]):
pass
my_inner_a1: 'B.A'
my_inner_a2: A
my_outer_a: 'A' # unless somebody calls get_type_hints with localns=B.__dict__
type Alias = int
OldStyle = TypeAliasType("OldStyle", int)