Use LevenshteinRatio to more fairly compare results

- When comparing "Ilium" to "Olympus"

  LevenshteinDistance  = 94
  LevenshteinRatio     = 14

Note: should be part of Util but errors as not found

Author: jmeosbn

Contents/Code/__init__.py

@@ -262,6 +262,12 @@ def findDateInTitle(self, title):
             return Datetime.ParseDate(result.group(0)).date()
         return None
 
+    def LevenshteinRatio(self, first, second):
+        if len(first) == 0 or len(second) == 0:
+            return 0.0
+        else:
+            return 1 - (Util.LevenshteinDistance(first, second) / float(max(len(first), len(second))))
+
     def doSearch(self, url, ctx):
         html = HTML.ElementFromURL(url, sleep=REQUEST_DELAY)
         found = []
@@ -391,14 +397,15 @@ def search(self, results, media, lang, manual):
             #self.Log('scorebase1:    %s', scorebase1)
             #self.Log('scorebase2:    %s', scorebase2)
 
-            score = INITIAL_SCORE - Util.LevenshteinDistance(scorebase1, scorebase2)
+            # use LevenshteinRatio as distance smaller for short strings
+            score = int(round(self.LevenshteinRatio(scorebase1, scorebase2) * 100.0))
 
             if media.artist:
               scorebase3 = media.artist
               scorebase4 = author
               #self.Log('scorebase3:    %s', scorebase3)
               #self.Log('scorebase4:    %s', scorebase4)
-              score = int(round((score + INITIAL_SCORE - Util.LevenshteinDistance(scorebase3, scorebase4)) /2))
+              score = int(round((score + self.LevenshteinRatio(scorebase3, scorebase4) * 100.0)) /2)
 
 
             self.Log('* Title is              %s', title)