class A():
def __init__(self):
pass
def func(pra1:A):
pass这种情况下，在 def func (par1:A) 中的 A 会报错，因为类 A 没有生成。请问这这种如何解决
For different versions of Python
In Python 3.6 or below, you should use a string - 'A'
In PEP 484 – Type Hints
Forward references
When a type hint contains names that have not been defined yet, that definition may be expressed as a string literal, to be resolved later.
In Python 3.7 ~ 3.10, you can add statement from __future__ import annotations
In Python 3.11+, you can use from typing import Self, then use def func(pra1:Self):
For different versions of Python
In Python 3.6 or below, you should use a string - 'A'
In PEP 484 – Type Hints
Forward references
When a type hint contains names that have not been defined yet, that definition may be expressed as a string literal, to be resolved later.
In Python 3.7 ~ 3.10, you can add statement from __future__ import annotations
In Python 3.11+, you can use from typing import Self, then use def func(pra1:Self):
如一楼所说，加 双引号 就可以，或者 from __future__ import annotations。当然 py311 你还可以用 from typing import Self 代替。
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