Base_Classifier wasn't unicode-ready.

Author: emmyzero

textblob/classifiers.py

@@ -83,11 +83,11 @@ def basic_extractor(document, train_set):
         el_zero = iter(train_set).next() #Infer input from first element.
     except StopIteration:
         return {}
-    if isinstance(el_zero, str):
+    if isinstance(el_zero, basestring):
         word_features = [w for w in chain([el_zero],train_set)]
     else:
         try:
-            assert(isinstance(el_zero[0], str))
+            assert(isinstance(el_zero[0], basestring))
             word_features = _get_words_from_dataset(chain([el_zero],train_set))
         except:
             raise ValueError('train_set is proabably malformed.')