装饰器

示例

import time

def compute_func_time(fn):
    def compute():
        print('开始')
        start_time = time.time()
        result = fn()
        end_time = time.time()
        print('结束')
        print(f'执行时间：{(end_time - start_time).__floor__()} s')
        return result

    return compute  # 注意这里返回的不是函数调用

@compute_func_time
def func():
    time.sleep(2)
    return '执行结束'

print(func())