Gentlemen Agreement Type Hint

In [52]: @dataclass ...: class A: ...: x: int ...: y: str In [53]: a = A(1, 2) In [54]: type(a.x) Out[54]: int In [55]: type(a.y) Out[55]: int In [56]: # Gentlemen agreement

A Python dataclass declares `y` as a string, but the object is created with an integer and Python accepts it without enforcing the annotation. The joke is that type hints are merely a “gentlemen agreement” at runtime. EN: A Python dataclass declares `y` as a string, but the object is created with an integer and Python accepts it without enforcing the annotation. The joke is that type hints are merely a “gentlemen agreement” at runtime.

• @profunctor_io / 2575 2019-07-10