Python - instance, class and static methods and attributes

main.py

# https://pythonguide.readthedocs.io/en/latest/python/unix.html

class Test:
    public_class_attribute = 1
    _protected_class_attribute = 2
    __private_class_attribute = 3

    def __init__(self):
        self.public_instance_attribute = 4
        self._protected_instance_attribute = 5
        self.__private_instance_attribute = 6

    def instance_method(self):
        self.public_instance_attribute = 7
        self._protected_instance_attribute = 8
        self.__private_instance_attribute = 9
        return 'instance method', self

    @classmethod
    def class_method(cls):
        cls.public_class_attribute = 10
        cls._protected_class_attribute = 11
        cls.__private_class_attribute = 12
        return f'class method', cls

    @staticmethod
    def static_method():
        return 'static method'


def main():

    # Instance methode/attribute
    test = Test()
    print(test.instance_method())
    print(test.public_instance_attribute)

    # Class methode/attribute
    print(Test().class_method())
    print(Test().public_class_attribute)

    # Static methode
    print(Test().static_method())


if __name__ == '__main__':
    main()

# Output
# ('instance method', <__main__.Test object at 0x7f23e377cd00>)
# 7
# ('class method', <class '__main__.Test'>)
# 10
# static method