秒懂Python装饰器（一个装饰器，实现不同的装饰功能）

#-*- coding；utf-8 -*-
user,passwd = 'alex','abc123'
def auth(auth_type):
    print("auth func:",auth_type)
    def outer_wrapper(func):
        def wrapper(*args, **kwargs):
            print("wrapper func args:", *args, **kwargs)
            if auth_type == "local":
                username = input("Username:").strip()
                password = input("Password:").strip()
                if user == username and passwd == password:
                    print("\033[32;1mUser has passed authentication\033[0m")
                    res = func(*args, **kwargs)  # from home
                    print("---after authenticaion ")
                    return res
                else:
                    exit("\033[31;1mInvalid username or password\033[0m")
            elif auth_type == "ldap":
                print("搞毛线ldap,不会。。。。")

        return wrapper
    return outer_wrapper

def index():
    print("welcome to index page")
@auth(auth_type="local") # home = wrapper()
def home():
    print("welcome to home  page")
    return "from home"

@auth(auth_type="ldap")
def bbs():
    print("welcome to bbs  page")

index()
print(home()) #wrapper()
bbs()

auth func: local
auth func: ldap
welcome to index page
wrapper func args:
Username:Alex
Password:abc123
None
wrapper func args:
搞毛线ldap,不会。。。。

装饰器总结：装饰器本质上是一个函数，通过这个函数去装饰另一个函数，当调用函数home()时，实际上调用了auth(auth_type),再定义高阶函数outer_wrapper将home的地址作为形参，再通过嵌套函数wrapper执行函数home()