code: def regex_match_sublist(regex, match_candidates):
      
      matches = []
      try:
          pattern = re.compile(cap_match_string(regex))
          matches = [cand for cand in match_candidates if pattern.match(cand)]
      except:
          logging.warn('[ros_interface] Ignoring invalid regex string "{0!s}"!'.format(regex))
      return matches
docs: Filter the match_candidates list to return only the candidate that match the regex
      :param regex: a regex used to filter the list of candidates
      :param match_candidates: the list of candidates
      :return: the filtered list of only the candidates that match the regex