docs: def _replace_mvs(row, mv):
      """
      Replace Missing Values in the data rows where applicable
      :param list row: Row
      :return list: Modified row
      """
      for idx, v in enumerate(row):
          try:
              if v.value.lower() in EMPTY or v.value.lower() == mv:
                  row[idx] = "nan"
              else:
                  row[idx] = v.value
          except AttributeError:
              if v.value == mv:
                  row[idx] = "nan"
              else:
                  row[idx] = v.value
  
      return row