HTTP实例在Python2.6上没有属性getresponse Error

Question

我试图用python进行一些jsonrpc调用。但是，由于api调用需要cookies，所以我创建了自己的传输类，jsonrpclib将使用这个类。对于最新的2.7python，这一点非常好用。但是，当我试图在python2.6.6上运行它时，它会抱怨“HTTP实例没有属性getresponse”

代码

class TransportMixIn(object):
    """ Just extends the XMLRPC transport where necessary. """
    user_agent = jsonrpclib.config.user_agent
    # for Python 2.7 support
    _connection = None

    def send_content(self, connection, request_body):
        connection.putheader("Content-Type", "application/json-rpc")
        connection.putheader("Content-Length", str(len(request_body)))

        if cookie != None :
            connection.putheader("Cookie",cookie)

        connection.endheaders()
        if request_body:
            connection.send(request_body)


    def getparser(self):
        target = JSONTarget()
        return JSONParser(target), target

    def request(self, host, handler, request_body, verbose=False):
        # issue XML-RPC request
        self.verbose = verbose


        try:
            h=self.make_connection(host)
            if verbose:
                h.set_debuglevel(1)

            self.send_request(h,handler,request_body)
            self.send_host(h,host)
            self.send_user_agent(h)
            self.send_content(h,request_body)
            **resp = h.getresponse()**
            if resp.status == 200:
                self.verbose = verbose
                global cookie 
                cookie = resp.getheader('set-cookie')
                return self.parse_response(resp)

        except xmlrpclib.Fault:
            raise
        except Exception:
            #All unexpected errors leave connection in
            # a strange state, so we clear it.
            self.close()
            raise

        #We got an error response.
        #Discard any response data and raise exception
        if resp.getheader("content-length", ""):
            resp.read()
        raise xmlrpclib.ProtocolError(
            host + handler,
            resp.status, resp.reason,
            dict(resp.getheaders())
            )



class Transport(TransportMixIn, XMLTransport):
    pass

class SafeTransport(TransportMixIn, XMLSafeTransport):
    pass

错误发生在resp=h.getresponse（）的行

有什么想法吗？？ 顺便说一句，python是这样一种语言，当在不同版本上运行时，代码会很容易出错吗？这种有线行为在我身上发生过多次。在