Python

Question

我在 python 中编写了以下基本静态 class：

from abc import ABC,abstractmethod

import typing
from main_module import utils


class BaseCLS(ABC):
    credentials = None # <--- I want to set this var
    def __init_session(caller) -> None:
        credentials = utils.get_creds() # <--- not the right var

    @staticmethod
    @__init_session
    def process(path: str) -> None:
        raise NotImplementedError

基础class私有方法__init_session在每次调用process时由装饰器触发。我试图从私有方法中设置 credentials class var 但没有成功。我怎样才能实现我的目标？

Answer 1

如果你想在派生的 classes 中设置 class 变量，下面的方法可行。

from abc import ABC,abstractmethod
import typing
import random

class BaseCLS(ABC):
    credentials = None # <--- I want to set this var

    def __init_session(caller) -> None:
        def inner(cls, path):
            # credentials = utils.get_creds()
            cls.credentials = random.random()
            caller(cls, path)
        return inner

    @classmethod # <--- changed to classmethod
    @__init_session
    def process(cls, path: str) -> None:
      pass

class B(BaseCLS):
  pass

class C(BaseCLS):
  pass


B.process("a")
C.process("b")

print(B.credentials)
print(C.credentials)

Python - 从私有静态方法设置 class var

Python - set class var from a private static method

static

abstract-class

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