1 from __future__ import annotations 2 USING_STRINGS = True 3 4 # dataclass_module_2.py and dataclass_module_2_str.py are identical 5 # except only the latter uses string annotations. 6 7 from dataclasses import dataclass, InitVar 8 from typing import ClassVar 9 10 T_CV2 = ClassVar[int] 11 T_CV3 = ClassVar 12 13 T_IV2 = InitVar[int] 14 T_IV3 = InitVar 15 16 @dataclass 17 class CV: 18 T_CV4 = ClassVar 19 cv0: ClassVar[int] = 20 20 cv1: ClassVar = 30 21 cv2: T_CV2 22 cv3: T_CV3 23 not_cv4: T_CV4 # When using string annotations, this field is not recognized as a ClassVar. 24 25 @dataclass 26 class IV: 27 T_IV4 = InitVar 28 iv0: InitVar[int] 29 iv1: InitVar 30 iv2: T_IV2 31 iv3: T_IV3 32 not_iv4: T_IV4 # When using string annotations, this field is not recognized as an InitVar. 33