code: def extractOne(query, choices, processor=default_processor, scorer=default_scorer, score_cutoff=0):
      
      best_list = extractWithoutOrder(query, choices, processor, scorer, score_cutoff)
      try:
          return max(best_list, key=lambda i: i[1])
      except ValueError:
          return None
docs: Find the single best match above a score in a list of choices.
  
      This is a convenience method which returns the single best choice.
      See extract() for the full arguments list.
  
      Args:
          query: A string to match against
          choices: A list or dictionary of choices, suitable for use with
              extract().
          processor: Optional function for transforming choices before matching.
              See extract().
          scorer: Scoring function for extract().
          score_cutoff: Optional argument for score threshold. If the best
              match is found, but it is not greater than this number, then
              return None anyway ("not a good enough match").  Defaults to 0.
  
      Returns:
          A tuple containing a single match and its score, if a match
          was found that was above score_cutoff. Otherwise, returns None.