day④：装饰器

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv
        print("passed user verification...")
        return func  #返回func，即是tv的内存地址
def tv():
    print("welcome [%s] to home page")
tv = login(tv)  #tv是变量
tv()  #tv加上括号，就调用tv函数
结果：
passed user verification...
welcome [%s] to home page

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv
        print("passed user verification...")
        return func  #返回func，即是tv的内存地址
@login  #tv=login(tv)
def tv(name):
    print("welcome [%s] to home page" %name)
tv("yaobin")  #tv加上括号，就调用tv函数
结果：
passed user verification...
welcome [yaobin] to home page

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv
        print("passed user verification...")
        return func  #返回func，即是tv的内存地址
@login  #tv=login(tv)
def tv(name):
    print("welcome [%s] to home page" %name)
结果：
passed user verification...
#我都还没有tv("yaobin"),就已经执行了验证

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv
        def inner(arg):
            print("passed user verification...")
            #return func #这里不用return了，应该是执行！
            func(arg) #tv
        return inner  #login 返回inner的内存地址
@login  #tv=login(tv)
def tv(name):
    print("welcome [%s] to home page" %name)
#tv("yaobin")  #这里加上括号，相当于调用inner！而且有参数，所有inner也要有参数，func也要有参数
①结果：
空
②把#tv("yaobin")打开，结果：
passed user verification...
welcome [yaobin] to home page

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv or moive
        def inner(arg1,arg2):
            print("passed user verification...")
            #return func #这里不用return了，应该是执行！
            func(arg1,arg2) #tv or moive
        return inner  #login 返回inner的内存地址
@login
def moive(name,anything): #moive=moive(tv)
   print("welcome [%s] to home page" %name)
@login  #tv=login(tv)
def tv(name,passwd):
    print("welcome [%s] to home page" %name)
    print("my passwd is :[%s] " %passwd)
tv("yaobin","123456")
print("")
moive("hy","anything")
#结果
passed user verification...
welcome [yaobin] to home page
my passwd is :[123456] 
passed user verification...
welcome [hy] to home page

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv
        def inner(*args,**kwargs):
            print("passed user verification...")
            #return func #这里不用return了，应该是执行！
            func(*args,**kwargs) #tv or moive
        return inner  #login 返回inner的内存地址
@login  #moive=moive(tv)
def moive(name,passwd=123456):  #passwd有默认参数
   print("welcome [%s] to home page" %name)
   print("my passwd is :[%s] " %passwd)
@login  #tv=login(tv)
def tv(name,passwd=456789):  #passwd有默认参数
    print("welcome [%s] to home page" %name)
    print("my passwd is :[%s] " %passwd)
    
#①自定义参数
moive("hy","one")
tv("yaobin","two")
print("")
#②使用默认参数
moive("hy")
tv("yaobin")
结果：
passed user verification...
welcome [hy] to home page
my passwd is :[one] 
passed user verification...
welcome [yaobin] to home page
my passwd is :[two] 
passed user verification...
welcome [hy] to home page
my passwd is :[123456] 
passed user verification...
welcome [yaobin] to home page
my passwd is :[456789] 

#!/usr/bin/python
#coding=utf-8
#py3
def login(func):  #func=tv or moive
        def inner(*args,**kwargs):
            print("passed user verification...")
            #return func #这里不用return了，应该是执行！
            return func(*args,**kwargs) #tv or moive   ##这里要return，不然没有返回值
        return inner  #login 返回inner的内存地址
@login  #moive=moive(tv)
def moive(name,passwd=123456):  #passwd有默认参数
    print("welcome [%s] to home page" %name)
    print("my passwd is :[%s] " %passwd)
@login  #tv=login(tv)
def tv(name,passwd=456789):  #passwd有默认参数
    print("welcome [%s] to home page" %name)
    print("my passwd is :[%s] " %passwd)
    return  name,passwd
moive("hy") #moive()加上括号，相当于调用inner！而且有参数，所有inner也要有参数，func也要有参数
print("")
t= tv("yaobin","my passwd haha")  #tv()加上括号，相当于调用inner！而且有参数，所有inner也要有参数，func也要有参数
print(t)  #看返回值
结果：
passed user verification...
welcome [hy] to home page
my passwd is :[123456] 
passed user verification...
welcome [yaobin] to home page
my passwd is :[my passwd haha] 
(‘yaobin‘, ‘my passwd haha‘)