name mangling

person.py

class Person:

    def __init__(self, name):
        self.__secret_attribute = 42
        self.name = name


if __name__ == "__main__":
    person = Person("Yu")
    # print(person.__secret_attribute) # AttributeError: 'Person' object has no attribute '__secret_attribute'

    # notice that a name mangled attribute has been added to this instance's __dict__
    print(person.__dict__) # {'_Person__secret_attribute': 42, 'name': 'Yu'}

    # we can still access the secret attribute
    print(person.__getattribute__("_Person__secret_attribute"))  # 42