如何以有效的方式添加非标准属性

my_dict = {}
my_dict['non_standard_attribute'] = 'value'

class Meta(type):
    def __new__(cls, name, bases, dct):
        dct['non_standard_attribute'] = 'value'
        return super().__new__(cls, name, bases, dct)

class MyClass(metaclass=Meta):
    pass

print(MyClass.non_standard_attribute)  # 输出：value

class MyClass:
    pass

setattr(MyClass, 'non_standard_attribute', 'value')
print(MyClass.non_standard_attribute)  # 输出：value

import inspect

class MyClass:
    pass

inspect.setattr_static(MyClass, 'non_standard_attribute', 'value')
print(MyClass.non_standard_attribute)  # 输出：value