Python笔记总结week5

Decorator:多层装饰器

#双层装饰器(用户登录,权限)
#多层: 调用从最外层到最内层函数,返回值则从最内到最外层函数

USER_INFO = {}
#USER_INFO['is_login'] = True
#USER_INFO['user_type'] = 2

def check_login(func):
    def inner(*args,**kwargs):
        if USER_INFO.get('is_login',None):
            ret = func(*args,**kwargs)
            return ret
        else:
            print("please login")
    return inner

def check_admin(func):
    def inner(*args, **kwargs):
        if USER_INFO.get('user_type',None) == 2:
            ret = func(*args, **kwargs)
            return ret
        else:
            print("You are not allowed to do this")
    return inner

@check_login
@check_admin
def index():
    print("index")

index()

Packages:创建与运用