python error xmlrpc.client.Fault: ＜Fault 2: “Object project.tags doesn‘t exist“＞

 File "E:\odsoft\python\lib\xmlrpc\client.py", line 659, in close

    raise Fault(**self._stack[0])

xmlrpc.client.Fault:

def __request(self, methodname, params):
    # call a method on the remote server

    request = dumps(params, methodname, encoding=self.__encoding,
                    allow_none=self.__allow_none).encode(self.__encoding, 'xmlcharrefreplace')

    # print('r',request)
    # print(params)
    # print(self.__verbose)
    print('req',self.__host,self.__handler)
    response = self.__transport.request(
        self.__host,
        self.__handler,
        request,
        verbose=self.__verbose
        )

res.users

req localhost:8069 /xmlrpc/2/common

colse params []

response (2,)

project.tags

req localhost:8069 /xmlrpc/2/common

colse params []

response (2,)

req localh