如何在python中更改类中函数的一部分？

class MyClass:
    def my_function(self):
        print("Original function")

# 直接修改函数
MyClass.my_function = lambda self: print("Modified function")

class MyClass:
    def my_function(self):
        print("Original function")

class ModifiedClass(MyClass):
    def my_function(self):
        print("Modified function")

# 使用新的类
obj = ModifiedClass()
obj.my_function()  # 输出: Modified function

def my_decorator(func):
    def wrapper(self):
        print("Before function call")
        func(self)
        print("After function call")
    return wrapper

class MyClass:
    @my_decorator
    def my_function(self):
        print("Original function")

obj = MyClass()
obj.my_function()
# 输出:
# Before function call
# Original function
# After function call

class MyClass:
    def my_function(self):
        print("Original function")

def new_function(self):
    print("Modified function")

MyClass.my_function = new_function

obj = MyClass()
obj.my_function()  # 输出: Modified function