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Code: Alles auswählen

>>> __BAR = "hello world"
>>> class Foo:
...     def baz(self):
...         return __BAR
...
>>> f = Foo()
>>> f.baz()
Traceback (most recent call last):
  Cell In[5], line 1
    f.baz()
  Cell In[3], line 3 in baz
    return __BAR
NameError: name '_Foo__BAR' is not defined

>>> _Foo__BAR = "hello world"
>>> class Foo:
...     def baz(self):
...         return __BAR
...
>>> f = Foo()
>>> f.baz()
'hello world'
>>>

Code: Alles auswählen

class Foo:
    __SECRET = 42

    def __getattribute__(self, attribute):
        print("__getattribute__:", attribute)
        return super().__getattribute__(attribute)

    def baz(self):
        return self.__SECRET


print(Foo().baz())

Code: Alles auswählen

__getattribute__: baz
__getattribute__: _Foo__SECRET
42