code: def trade(self, trade_id, trade_price, trade_amount, trade_time):
          
          if self.status in [ORDER_STATUS.SUCCESS_PART, ORDER_STATUS.QUEUED]:
              trade_amount = int(trade_amount)
              trade_id = str(trade_id)
  
              if trade_amount < 1:
  
                  self._status = ORDER_STATUS.NEXT
              else:
                  if trade_id not in self.trade_id:
                      trade_price = float(trade_price)
  
                      trade_time = str(trade_time)
  
                      self.trade_id.append(trade_id)
                      self.trade_price = (
                          self.trade_price * self.trade_amount +
                          trade_price * trade_amount
                      ) / (
                          self.trade_amount + trade_amount
                      )
                      self.trade_amount += trade_amount
                      self.trade_time.append(trade_time)
                      self.callback(
                          self.code,
                          trade_id,
                          self.order_id,
                          self.realorder_id,
                          trade_price,
                          trade_amount,
                          self.towards,
                          trade_time
                      )
                  else:
                      pass
          else:
              raise RuntimeError(
                  'ORDER STATUS {} CANNNOT TRADE'.format(self.status)
              )
docs: trade 状态
  
          Arguments:
              amount {[type]} -- [description]