def large_than(size):

    def large_than_func(handler):
        return len(handler.buffer)>=size
    return large_than_func

def send_back(data):

    def send_back_func(handler):
        return handler.sock.sendall(data)
    return send_back_func

当然也可以在定义Mock行为时写成这样：

Mock.on(
    lambda handler:large_than(handler,192)
).do(
    lambda handler:send_back(handler, …… )
)

class MockRequestHandler(SocketServer.BaseRequestHandler):

    mocks=[]

    class MockObjectProxy(object):

        def __init__(self,handle,obj):

            self.__handle=handle
            self.__obj=obj

        def do(self,*funcs):

            self.__handle.mocks.append(self.__obj.do(*funcs))
            print self.__obj.on_list,self.__obj.do_list
            return self.__handle

    @staticmethod
    def on(*funcs):

        return MockRequestHandler.MockObjectProxy(
            MockRequestHandler,
            MockObject().on(*funcs)
        )