[Mod]简化大商所的Tick日期计算逻辑

vnpy/trader/gateway/ctpGateway/ctpGateway.py

@@ -247,10 +247,6 @@ class CtpMdApi(MdApi):
         self.brokerID = EMPTY_STRING        # 经纪商代码
         self.address = EMPTY_STRING         # 服务器地址
         
-        self.tradingDt = None               # 交易日datetime对象
-        self.tradingDate = EMPTY_STRING     # 交易日期字符串
-        self.tickTime = None                # 最新行情time对象
-        
     #----------------------------------------------------------------------
     def onFrontConnected(self):
         """服务器连接"""
@@ -298,14 +294,6 @@ class CtpMdApi(MdApi):
             for subscribeReq in self.subscribedSymbols:
                 self.subscribe(subscribeReq)
                 
-            # 获取交易日
-            #self.tradingDate = data['TradingDay']
-            #self.tradingDt = datetime.strptime(self.tradingDate, '%Y%m%d')
-            
-            # 登录时通过本地时间来获取当前的日期
-            self.tradingDt = datetime.now()
-            self.tradingDate = self.tradingDt.strftime('%Y%m%d')
-                
         # 否则，推送错误信息
         else:
             err = VtErrorData()
@@ -388,18 +376,7 @@ class CtpMdApi(MdApi):
         
         # 大商所日期转换
         if tick.exchange is EXCHANGE_DCE:
-            newTime = datetime.strptime(tick.time, '%H:%M:%S.%f').time()    # 最新tick时间戳
-            
-            # 如果新tick的时间小于夜盘分隔，且上一个tick的时间大于夜盘分隔，则意味着越过了12点
-            if (self.tickTime and 
-                newTime < NIGHT_TRADING and
-                self.tickTime > NIGHT_TRADING):
-                self.tradingDt += timedelta(1)                          # 日期加1
-                self.tradingDate = self.tradingDt.strftime('%Y%m%d')    # 生成新的日期字符串
-                
-            tick.date = self.tradingDate    # 使用本地维护的日期
-            
-            self.tickTime = newTime         # 更新上一个tick时间
+            tick.date = datetime.now().strftime('%Y%m%d')
         
         self.gateway.onTick(tick)