python装饰器

Posted 2021-02-11 你居然是华神

#coding=utf-8

def outer(fun):
    def wrapper():
        print (‘验证‘)

        fun()

        print (‘验证成功‘)
    return wrapper

@outer
def func1():
    print (‘func1‘)

@outer
def func2():
    print (‘func2‘)

@outer
def func3():
    print (‘func3‘)

@outer
def func4():
    print (‘func4‘)


def before_func(request,kargs):
    print (‘myname is before func,request is %s,kargs is %s‘%(request,kargs))

def main_func(request,kargs):
    print (‘myname is main func,request is %s,kargs is %s‘%(request,kargs))


def after_func(request,kargs):
    print (‘myname is after func,request is %s,kargs is %s‘%(request,kargs))


#装饰器的层层嵌套
def fiter(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


@fiter(before_func,after_func)
def test(request,args):
    print (‘running...‘)

if __name__=="__main__":

    # func1()
    #
    # func2()
    #
    # func3()
    #
    # func4()

 s=test(‘hello‘,‘word‘)

    print (s)