如何编写合适的装饰器来修改类

def class_decorator(cls):
    class NewClass(cls):
        def __init__(self, *args, **kwargs):
            print("Creating an instance of the decorated class.")
            super().__init__(*args, **kwargs)
    return NewClass

@class_decorator
class MyClass:
    def __init__(self, value):
        self.value = value

# 使用装饰后的类
obj = MyClass(10)  # 输出: Creating an instance of the decorated class.

import functools

def class_decorator(cls):
    @functools.wraps(cls)
    class NewClass(cls):
        def __init__(self, *args, **kwargs):
            print("Creating an instance of the decorated class.")
            super().__init__(*args, **kwargs)
    return NewClass

@class_decorator
class MyClass:
    """Original class documentation."""
    def __init__(self, value):
        self.value = value

print(MyClass.__name__)  # 输出: MyClass
print(MyClass.__doc__)   # 输出: Original class documentation.

def add_method_decorator(cls):
    def new_method(self):
        return "New method added by decorator."
    
    cls.new_method = new_method
    return cls

@add_method_decorator
class MyClass:
    def __init__(self, value):
        self.value = value

# 使用装饰后的类
obj = MyClass(10)
print(obj.new_method())  # 输出: New method added by decorator.