docs: def search_stresses(pattern):
      """Get words whose stress pattern matches a regular expression.
  
      This function is a special case of :func:`search` that searches only the
      stress patterns of each pronunciation in the dictionary. You can get
      stress patterns for a word using the :func:`stresses_for_word` function.
  
      .. doctest::
  
          >>> import pronouncing
          >>> pronouncing.search_stresses('020120')
          ['gubernatorial']
  
      :param pattern: a string containing a regular expression
      :returns: a list of matching words
      """
      init_cmu()
      regexp = re.compile(pattern)
      return [word
              for word, phones in pronunciations
              if regexp.search(stresses(phones))]