typing.TypeVar

型変数

code:宣言する例.py

T = TypeVar('T') # Can be anything

S = TypeVar('S', bound=str) # Can be any subtype of str

A = TypeVar('A', str, bytes) # Must be exactly str or bytes

Type variables exist primarily for the benefit of static type checkers.

They serve as the parameters for generic types as well as for generic function definitions