code: def OnErrCancel(self, obj, f: OrderField, info: InfoField):
          
          print('=== [TRADE] OnErrCancel ===\n{0}'.format(f.__dict__))
          print(info)
docs: 撤单失败
              :param self:
              :param obj:
              :param f:OrderField:
              :param info:InfoField: