我正在尝试在Python 3中创建一个冷却器装饰器。理想用法如下：

@cooldown(duration=2)
def func(string):
  print(string)

然后...

func('1st attempt') # should work (as cooldown == 0) and reset cooldown (cooldown = 2)
func('2nd attempt') # should fail (as cooldown != 0)
func.update_cooldown() # should decrease cooldown (cooldown -= 1)
func('3rd attempt') # should also fail (as cooldown != 0)
func.update_cooldown() # should decrease cooldown (cooldown -= 1)
func('4th attempt') # should work (as cooldown == 0) and reset cooldown (cooldown = 2)

我的代码（Python 3.8）：

import functools

def cooldown(duration):
    def decorator(method):
        cooldown = 0

        @functools.wraps(method)
        def wrapper(*args,**kwargs):
            nonlocal cooldown
            if cooldown <= 0:
                cooldown = duration
                return method(*args,**kwargs)
            print(f'Cooldown active,{cooldown} updates remaining')

        return wrapper
    return decorator

我将如何添加减少特定装饰功能的冷却时间的功能？以及如何使它适应类方法？

谢谢！