Update mql.py

initialize df to an empty dataframe before the while loop.

ejtraderMT/api/mql.py

@@ -272,6 +272,7 @@ def _calendar(self,data):
  symbol = self._symbol
  fromDate = self._fromDate 
  toDate = self._toDate
+ df = pd.DataFrame()
  # count data
  if not isinstance(fromDate, int):
  start_date = datetime.strptime(fromDate, "%d/%m/%Y")
@@ -282,20 +283,19 @@ def _calendar(self,data):
  else:
  end_date = datetime.strptime(toDate, "%d/%m/%Y")
 
-
  delta = timedelta(days=1)
  delta2 = timedelta(days=1)
  diff_days = start_date - end_date
  days_count = diff_days.days
  pbar = tqdm(total=abs(days_count))
  appended_data = []
-
  while start_date <= end_date:
  pbar.update(delta.days)
  fromDate = start_date.strftime("%d/%m/%Y")
  toDate = start_date
  toDate += delta2
- toDate = toDate.strftime("%d/%m/%Y")
+ toDate = toDate.strftime("%d/%m/%Y") 
+
  if fromDate and toDate:
  try:
  df = self.__api.Command(action="CALENDAR", actionType="DATA", symbol=symbol, 
@@ -804,4 +804,4 @@ def __save_to_db(self,df):
  except AttributeError:
  pass
  if self.dbtype == "INFLUXDB":
- self.__client.write_points(df, f"{self.__active_name}", protocol=self.protocol)
+ self.__client.write_points(df, f"{self.__active_name}", protocol=self.protocol)