import time from functools import wraps def time_it(func): @wraps(func) def wrapper(): t = 0 for i in range(5): start = time.time() func() stop = time.time() t = t + (stop - start) ave = t / 5 print(f'func 函数平均执行时间{ave}秒') return wrapper @time_it def func_1(): print('func_1 开始') time.sleep(1) print('func_1 结束') func_1()

import random import time from functools import wraps def multi_run_avg(cnt: int): def time_it(func): @wraps(func) def wrapper(): start = time.time() for _ in range(cnt): func() stop = time.time() print(f"func runs {cnt} times, and its average run time is {round((stop - start) / cnt, 2)} secs.") return wrapper return time_it @multi_run_avg(5) def work(): print("func work start...") time.sleep(random.randint(1, 3)) print("func work stop!") work() # print(work.__name__)

import time from functools import wraps def time_five(func): @wraps(func) def wrapper(): start = time.time() for x in range(5): func() stop = time.time() print(f"func函数执行了{int(stop-start)}秒\n") print(f"运行五次func函数平均运行时间{int((stop-start) * 0.2)}秒") return wrapper @time_five def work(): print("func开始执行") time.sleep(2) print("func结束执行") work()

import time def a(func): def b(): list1 = [] for i in range(5): print(f"程序运行第{i+1}遍") start = time.time() func() end = time.time() list1.append(int(end - start)) avg_all = sum(list1) / 5 return avg_all return b @a def c(): print("延迟2秒") time.sleep(2) print(c())

# 请你定义一个装饰器，可以让函数运行 5 遍，并输出平均运行时间。 from random import uniform import time from functools import reduce, wraps def func_time(func): @wraps(func) def wrapper(): time_list = [] for i in range(5): start = time.time() func() stop = time.time() a = float(stop - start) time_list.append(a) x = float(reduce(lambda x,y: x+y, time_list)/5) print(f'函数 {func_list.__name__} 的平均执行时间是 {x:.6f}') return wrapper @func_time def func_list(): lst = [] for i in range(5): random_float = uniform(0,10) lst.append(random_float) return func_list()

from random import random from time import sleep, time def calc_avg(n): def decorate(func): def wrapper(): sum = 0.0 for _ in range(n): start = time() func() sum += time() - start print(f"Execute {n} times, average run time is {sum / n:.2f}s.") return wrapper return decorate @calc_avg(5) def random_work(): slp_time = random() * 5 print(f"This time used {slp_time:.2f}s.") sleep(slp_time) random_work()

from functools import wraps import time def countAvgRunTime(times: int): def wrapper(func): @wraps(func) def decorated(*args, **kwargs): runTimeSum = 0 for t in range(times): start = time.time() func(*args, **kwargs) stop = time.time() runTimeSum += (stop - start) print(f'平均运行和时间{runTimeSum / times}') return decorated return wrapper @countAvgRunTime(times=5) def sleep(): time.sleep(1) sleep()

老师讲得通俗易通！！

import random import time from functools import wraps def multi_run_avg(cnt: int): def time_it(func): @wraps(func) def wrapper(): start = time.time() for _ in range(cnt): func() stop = time.time() print(f"func runs {cnt} times, and its average run time is {round((stop - start) / cnt, 2)} secs.") return wrapper return time_it @multi_run_avg(5) def work(): time.sleep(random.random()) work()