有没有办法让特定 class 的所有子 class 都在访问属性时执行函数？

Question

我有一个带有自定义 __getattribute__ 定义的 class，例如：

class DummyBaseClass:
    def __getattribute__(self, name):
        #Interesting logging/validation code here
        return object.__getattribute__(self, name)

我希望此 class 的子class 也能在访问其属性时执行 #Interesting code 块中的内容，而不显式添加 __getattribute__ 对每个子class.

的定义

实现此目标的最佳方法是什么？

Answer 1

我想这就是你要找的：

class DummyBaseClass:
    test = 'Hello World'

    def __getattribute__(self, name):
        #Interesting logging/validation code here
        print(f"{self}: __getattribute__ is called")
        return object.__getattribute__(self, name)


class DummySubClass(DummyBaseClass):
    pass


class AnotherDummySubClass(DummyBaseClass):
    def __getattribute__(self, name):
        print('Hi, I do more than the others when __getattribute__ gets called')
        return super().__getattribute__(name)


class JustAnotherDummySubClass(AnotherDummySubClass):
    test_german = 'Hallo Welt'


print(DummyBaseClass().test)
print(DummySubClass().test)
print(AnotherDummySubClass().test)
print(JustAnotherDummySubClass().test_german)

有没有办法让特定 class 的所有子 class 都在访问属性时执行函数？

Is there a way to have all subclasses of a specific class execute a function whenever an attribute is accessed?

python

attributes

class