如何在函数中更改类中的值？

class MyClass:
    def __init__(self):
        self.value = 0

    def update_value(self, new_value):
        self.value = new_value

my_object = MyClass()
print(my_object.value)  # 输出：0
my_object.update_value(10)
print(my_object.value)  # 输出：10

class MyClass:
    value = 0

    @classmethod
    def update_value(cls, new_value):
        cls.value = new_value

print(MyClass.value)  # 输出：0
MyClass.update_value(10)
print(MyClass.value)  # 输出：10

class MyClass:
    value = 0

    @staticmethod
    def update_value(instance, new_value):
        instance.value = new_value

my_object = MyClass()
print(my_object.value)  # 输出：0
MyClass.update_value(my_object, 10)
print(my_object.value)  # 输出：10