Python3中装饰器的使用

较为复杂的装饰器使用：

user,passwd = 'hjc',111111

def auth(type):
    print('auth type:',type)
    def outwrapper(func):
        def wrapper(*args,**kwargs):
            if type == 'lll':
                username = input('username:').strip()
                password = int(input('password:').strip())
                if user == username and passwd == password:
                    print("33[32;1muser pass ~~~~~~33[0m")
                    func(*args,**kwargs)
                else:
                    exit("33[31;1minvalid user ~~~~~~33[0m")
            elif type == 'kkk':
                print('fuck off')
        return wrapper
    return outwrapper

def index():
    print("welcome to index page")
@auth('lll')
def home():
    print("welcome to home page")
@auth('kkk')
def bbs():
    print("welcome to bbs page")
index()
home()
bbs()

输出结果如下：

auth type: lll
auth type: kkk
welcome to index page
username:hjc
password:111111
user pass ~~~~~~
welcome to home page
fuck off

2.较为简单的装饰器：

import time

def timer(func):
    def inner(*args,**kwargs):
        start_time = time.time()
        func(*args,**kwargs)
        stop_time = time.time()
        print(stop_time-start_time)
    return inner


@timer
def wt():
    print('hello wt!!!')

wt()