修改了ctpGate的代码，想实现保证金和手续费的查询：

    def queryMarginRate(self):
        """查询保证金率"""
        self.reqid += 1
        req = {
            "BrokerID": self.brokerid,
            "InvestorID": self.userid,
            "InstrumentID": 'rb1910',
            "HedgeFlag": THOST_FTDC_HF_Speculation,
        }

        self.reqQryInstrumentMarginRate(req, self.reqid)

    def onRspQryInstrumentMarginRate(self, data: dict, error: dict, reqid: int, last: bool):
        """保证金回调"""
        for k, v in data.items():
            print(k, ':', v)

    def queryCommissionRate(self):
        """手续费查询"""
        self.reqid += 1
        req = {
            "BrokerID": self.brokerid,
            "InvestorID": self.userid,
            "InstrumentID": 'rb1910',
            # "HedgeFlag": THOST_FTDC_HF_Speculation,
            # "ExchangeID":'SHFE'
        }

        self.reqQryInstrumentCommissionRate(req, self.reqid)

    def onRspQryInstrumentCommissionRate(self, data: dict, error: dict, reqid: int, last: bool):
        """手续费回调"""
        for k, v in data.items():
            print(k, ':', v)

目前的情况是保证金可以查询出来，手续费不行。用得都是光大期货的ta和md address。
不知道是手续费的字典参数不对，还是说回调方法不太对。
求大神们指导！