python装饰器

给函数增加一个计时功能

def timer(func):  # func = home
    def inner(*args,**kwargs):
        start_time = time.time()
        ret = func(*args,**kwargs)
        end_time = time.time()
        print(f'此函数的执行效率为{end_time-start_time}')
        return ret
    return inner
​
@timer  # home = timer(home)
def home(name,age):
    time.sleep(3)  # 模拟一下网络延迟以及代码的效率
    print(name,age)
    print(f'欢迎访问{name}主页')
​
home('李宽洋',18)

给装饰器传参数

def auth(x):
    def auth2(func):
        def inner(*args, **kwargs):
            if login_status['status']:
                ret = func()
                return ret
            
            if x == 'wechat':
                username = input('请输入用户名：').strip()
                password = input('请输入密码：').strip()
                if username == '太白' and password == '123':
                    login_status['status'] = True
                    ret = func()
                    return ret
            elif x == 'qq':
                username = input('请输入用户名：').strip()
                password = input('请输入密码：').strip()
                if username == '太白' and password == '123':
                    login_status['status'] = True
                    ret = func()
                    return ret
        return inner
    return auth2
    
@auth('wechat')  
def jitter():
    print('记录美好生活')
​
@auth('qq')
def pipefish():
    print('期待你的内涵神评论')