先来一个简单的例子：

#!/usr/bin/env python
def log(func):    #接受被装饰函数
    def dec(*argv,**kwargs):   #接受被装饰函数的参数
        print("this is a add exaple!!")
        return func(*argv,**kwargs)  #接受被装饰函数的参数
    return dec


@log
def test(name,age):
    print("this is a test example!! %s   %s"  %  (name,age))

if __name__=="__main__":
    test("liujiangbu",27)


z装饰器带参数：

!/usr/bin/env python

encoding: utf-8

def start_info():
print ('电视剧开头曲.......')
print ('开始唱歌.......')
def end_info():
print ('电视剧结束曲.......')

def filter(start_info,end_info): #接收俩函数
def outer(main_fun): #接收装饰的函数
def app(argv,kwargs): #接收装饰的函数的参数
print('******************************')
start_info()
main_fun(argv,**kwargs)#接收装饰的函数的参数
end_info()
print('******************************')
return app
return outer

先把函数传进去，然后在用里面的函数装饰

传函数的装饰器必须有三个def ,第一个是接受函数，第二个是装饰函数的，返回第三个函数对象

把需要装饰的函数重新定义，然后调用调用

1: filter(start_info,end_info):

2: @outer -> one_info = outer(one_info)

@filter(start_info,end_info) #这里传入俩个函数
def one_info(name,info):
print ('this is one')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

@filter(start_info,end_info)
def two_info(name,info):
print('this is two')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

@filter(start_info,end_info)
def three_info(name,info):
print('this is three')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

if name == "main":
print('三国演义三部曲开始。。。。。。。。')
print('第一部。。。。。。。。。。。。。。')
one_info('三国电视剧第一部', '三国大战')

print('第二部。。。。。。。。。。。。。。')
two_info('三国电视剧第二部', '三国英雄')

print('第三部。。。。。。。。。。。。。。')
three_info('三国电视剧第三部', '三国鼎力')

装饰器不带参数：

!/usr/bin/env python

encoding: utf-8

def start_info():
print ('电视剧开头曲.......')
print ('开始唱歌.......')
def end_info():
print ('电视剧结束曲.......')

def outer(main_fun): #接收装饰的函数
def app(argv,kwargs): #接收装饰的函数的参数
print('******************************')
start_info()
main_fun(argv,**kwargs)#接收装饰的函数的参数
end_info()
print('******************************')
return app

1: @outer -> one_info = outer(one_info)

@outer
def one_info(name,info):
print ('this is one')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

@outer
def two_info(name,info):
print('this is two')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

@outer
def three_info(name,info):
print('this is three')
print('wolcome to tv %s .......' % (name))
print('wolcome to tv %s .......' % (info))

if name == "main":
print ('三国演义三部曲开始。。。。。。。。')
print ('第一部。。。。。。。。。。。。。。')
one_info('三国电视剧第一部','三国大战')

print('第二部。。。。。。。。。。。。。。')
two_info('三国电视剧第二部','三国英雄')

print('第三部。。。。。。。。。。。。。。')
three_info('三国电视剧第三部','三国鼎力')

http://www.cnblogs.com/cicaday/p/python-decorator.html