Merge pull request scikit-learn#3240 from JelleZijlstra/fix-defaultdict

jnothman · jnothman · commit fffdfaafb71a · 2014-06-05T22:55:13.000+10:00
FIX defaultdict call for some Python versions
diff --git a/sklearn/feature_extraction/text.py b/sklearn/feature_extraction/text.py
@@ -726,7 +726,7 @@ def _count_vocab(self, raw_documents, fixed_vocab):
             vocabulary = self.vocabulary_
         else:
             # Add a new value when a new vocabulary item is seen
-            vocabulary = defaultdict(None)
+            vocabulary = defaultdict()
             vocabulary.default_factory = vocabulary.__len__
 
         analyze = self.build_analyzer()
