code: def partial_ratio(s1, s2):
      Return the ratio of the most similar substring
      as a number between 0 and 100."""
      s1, s2 = utils.make_type_consistent(s1, s2)
  
      if len(s1) <= len(s2):
          shorter = s1
          longer = s2
      else:
          shorter = s2
          longer = s1
  
      m = SequenceMatcher(None, shorter, longer)
      blocks = m.get_matching_blocks()
  
      # each block represents a sequence of matching characters in a string
      # of the form (idx_1, idx_2, len)
      # the best partial match will block align with at least one of those blocks
      #   e.g. shorter = "abcd", longer = XXXbcdeEEE
      #   block = (1,3,3)
      #   best score === ratio("abcd", "Xbcd")
      scores = []
      for block in blocks:
          long_start = block[1] - block[0] if (block[1] - block[0]) > 0 else 0
          long_end = long_start + len(shorter)
          long_substr = longer[long_start:long_end]
  
          m2 = SequenceMatcher(None, shorter, long_substr)
          r = m2.ratio()
          if r > .995:
              return 100
          else:
              scores.append(r)
  
      return utils.intr(100 * max(scores))
docs: Return the ratio of the most similar substring
      as a number between 0 and 100.