docs: def __compare_vars(a1, a2, name):
      """
      Check that the metadata variable names are the same as the data header variable names
      :param list a1: Variable names
      :param list a2: Variable names
      :param str name: Sheet name
      :return bool: Truth
      """
      try:
          a1 = [i for i in a1 if i]
          a2 = [i for i in a2 if i]
          a3 = set(a1).symmetric_difference(set(a2))
          if a3:
              print("- Error: Variables are not entered correctly in sheet: {}\n\tUnmatched variables: {}".format(name, a3))
      except Exception as e:
          logger_excel.error("compare_vars: {}".format(e))
      return