code: def words_from_archive(filename, include_dups=False, map_case=False):
      
      bz2 = os.path.join(PATH, BZ2)
      tar_path = '{}/{}'.format('words', filename)
      with closing(tarfile.open(bz2, 'r:bz2')) as t:
          with closing(t.extractfile(tar_path)) as f:
              words = re.findall(RE, f.read().decode(encoding='utf-8'))
      if include_dups:
          return words
      elif map_case:
          return {w.lower():w for w in words}
      else:
          return set(words)
docs: extract words from a text file in the archive