def isWeekend(self, df_date_str):
      # 2021-07-01 07:28:04
      datetime_object = datetime.strptime(df_date_str, '%Y-%m-%d %H:%M:%S')
      # print(datetime_object.weekday())
      if datetime_object.weekday() < 5:
          return 0
      else:  # 5 Sat, 6 Sun
          return 1