我想在类中修饰一个方法但不编辑class.py - 里面的细节

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print(f"{func.__name__} is starting...")
        result = func(*args, **kwargs)
        print(f"{func.__name__} has finished.")
        return result
    return wrapper

class MyClass:
    @my_decorator
    def my_method(self, x):
        print(f"The result is {x * 2}")

my_instance = MyClass()
my_instance.my_method(5)

my_method is starting...
The result is 10
my_method has finished.