return '' instead of None in imdb.getMovieId

ox/wikipedia.py

@@ -15,14 +15,14 @@ def getMovieId(title, director='', year=''):
   return ''
 
 def getUrlByImdb(imdbId):
-  if len(imdbId) != 7: return ''
-  result = find("imdb_id "+imdbId)
+  query = '"imdb_id = %s"'% imdbId
+  result = find(query)
   if result:
     url = result[0][1]
-    data = getUrl(url)
-    if 'title/tt%s' % imdbId in data:
-      return url
-  return ''
+    return url
+  if str(imdbId).startswith('0'):
+    imdbId = imdbId[1:]
+    return getUrlByImdb(imdbId)
 
 def getUrlByAmbId(amg_id):
   query = '"amg_id = %s"'% amg_id