内置模块 - functools -> wraps

带参数的装饰器：@wraps()

import time
from functools import wraps

def time_fun(type):
    def outter(func):
        @wraps(func)  #可以得到原始函数add的原始信息 
        def inner(*args, **kwargs):
            time_start = time.time()
            func(*args, **kwargs)
            time_end = time.time()
            print(time_end - time_start)
        return inner
    print(type)
    return outter


@time_fun('ok')
# <function time_fun.<locals>.outter.<locals>.inner at 0x00000158C9810BF8>
# <function add at 0x000001B9CEBD0AE8>
def add(x, y):
    time.sleep(2)
    return x+y

print(add)