import time

def time_value(dec):
    def wrapper(*args,**kwargs):
        start_time = time.time()
        get_str = dec(*args,**kwargs)
        end_time = time.time()
        print("函数运行共耗时：",end_time-start_time)
        return get_str
    return wrapper

@time_value
def test():
    i = 0
    while i < 10000:
        i += 1
    return i

print(test())

函数运行共耗时： 0.0006766319274902344
10000