有没有办法获得动态默认参数？

def default_value():
    return "default"

def my_function(param=default_value()):
    print(param)

my_function()  # 输出 "default"
my_function("hello")  # 输出 "hello"

def default_param(func):
    def wrapper(*args, **kwargs):
        if 'param' not in kwargs:
            kwargs['param'] = "default"
        return func(*args, **kwargs)

    return wrapper

@default_param
def my_function(param):
    print(param)

my_function()  # 输出 "default"
my_function("hello")  # 输出 "hello"

class MyClass:
    def __init__(self, param=None):
        if param is None:
            self.param = "default"
        else:
            self.param = param

    def my_function(self):
        print(self.param)

obj1 = MyClass()
obj1.my_function()  # 输出 "default"

obj2 = MyClass("hello")
obj2.my_function()  # 输出 "hello"