没有参数

def w1(func):
    def inner():
        # 验证1
        # 验证2
        # 验证3
        return func(arg)
    return inner
            
@w1
def f1():
    print 'f1'

一个参数

def w1(func):
    def inner(arg):
        # 验证1
        # 验证2
        # 验证3
        return func(arg)
    return inner
 
@w1
def f1(arg):
    print 'f1'

两个参数

def w1(func):
    def inner(arg1,arg2):
        # 验证1
        # 验证2
        # 验证3
        return func(arg1,arg2)
    return inner
 
@w1
def f1(arg1,arg2):
    print 'f1'

三个参数

def w1(func):
    def inner(arg1,arg2,arg3):
        # 验证1
        # 验证2
        # 验证3
        return func(arg1,arg2,arg3)
    return inner
 
@w1
def f1(arg1,arg2,arg3):
    print 'f1'

问题：可以装饰具有处理n个参数的函数的装饰器？

def w1(func):
    def inner(*args,**kwargs):
        # 验证1
        # 验证2
        # 验证3
        return func(*args,**kwargs)
    return inner
 
@w1
def f1(arg1,arg2,arg3):
    print 'f1'

问题：一个函数可以被多个装饰器装饰吗？

def w1(func):
    def inner(*args,**kwargs):
        # 验证1
        # 验证2
        # 验证3
        return func(*args,**kwargs)
    return inner
 
def w2(func):
    def inner(*args,**kwargs):
        # 验证1
        # 验证2
        # 验证3
        return func(*args,**kwargs)
    return inner
 
 
@w1
@w2
def f1(arg1,arg2,arg3):
    print 'f1'

问题：还有什么更吊的装饰器吗？

#!/usr/bin/env python
#coding:utf-8
  
def Before(request,kargs):
    print 'before'
      
def After(request,kargs):
    print 'after'
  
  
def Filter(before_func,after_func):
    def outer(main_func):
        def wrapper(request,kargs):
              
            before_result = before_func(request,kargs)
            if(before_result != None):
                return before_result;
              
            main_result = main_func(request,kargs)
            if(main_result != None):
                return main_result;
              
            after_result = after_func(request,kargs)
            if(after_result != None):
                return after_result;
              
        return wrapper
    return outer
      
@Filter(Before, After)
def Index(request,kargs):
    print 'index'