逐行代码解读Python装饰器的工作原理

函数基础

1. 函数被定义的时候，不执行函数体内的语句
2. 函数名func和函数调用func()的区别
3. 函数参数的种类
4. 函数调用函数
5. Python语法可视化网站 ```python def hello():
   print(“hello world!”)

def say1(func): func()

def say2(args,*kw): print(args) print(kw)

def people(func): def say(args,*kw): func() # hello world! print(args) # (1,2,3) print(kw) #{‘name’:’jiuge’, ‘age’ = ‘18’} return say

people(hello)(1,2,3,name=”jiuge”,age=”18”)

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### 装饰器代码解析
```python
def login(url):
    def login_2(func):
        def password(*args,**kw):
            password = input("请输入管理员密码：")
            if password == '123456':
                func(*args,**kw)
                print("当前登录网址是 http://www.jiuge999.com{}".format(url))
            else:
                print("密码修改错误！")
        return password
    return login_2
#管理员登录提示
@login('/index')          # login(admin_index)
def admin_index(name = "九歌"):
    print("当前登录管理员的名字是{}!".format(name))
#管理员姓名修改
@login('/admin-change-name')            # login(admin_change_name)
def admin_change_name(new_name):
    name = "九歌"
    name = new_name
    print("管理员名字改为{}!".format(name))
admin_index(name="九妹")   #login('/index')(admin_index)(name="九妹")
#admin_change_name("九弟")  #login('/admin-change-name')(login_2)("九弟")
# login(admin_index)(name="九妹")
# login(admin_change_name)("九妹")

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