code: def parse(self, x):
          
          # Since the result of json.dumps(tuple) differs from a tuple string, we must handle either case.
          # A tuple string may come from a config file or from cli execution.
  
          # t = ((1, 2), (3, 4))
          # t_str = '((1,2),(3,4))'
          # t_json_str = json.dumps(t)
          # t_json_str == '[[1, 2], [3, 4]]'
          # json.loads(t_json_str) == t
          # json.loads(t_str) == ValueError: No JSON object could be decoded
  
          # Therefore, if json.loads(x) returns a ValueError, try ast.literal_eval(x).
          # ast.literal_eval(t_str) == t
          try:
              # loop required to parse tuple of tuples
              return tuple(tuple(x) for x in json.loads(x, object_pairs_hook=_FrozenOrderedDict))
          except (ValueError, TypeError):
              return tuple(literal_eval(x))
docs: Parse an individual value from the input.
  
          :param str x: the value to parse.
          :return: the parsed value.