装饰器

def count_time(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        res = func(*args, **kwargs)
        end_time = time.time()
        print(end_time - start_time)
        return res
​
    return wrapper
​
"""
只要运行语法糖这行代码(@count_time)，就会立刻调用这个装饰器功能，然后把要装饰的函数地址传进去即：count_time(home) 最后把得到的结果赋值给原函数名，home = count_time(home)
"""
@count_time
def home():
    print("dhdh")
    time.sleep(2)
    print("haha")
    return "home函数的返回值"
​
​
print(home())