COSMIT removed unused imports, fixed error message in test of boosting

Author: amueller

sklearn/ensemble/tests/test_weight_boosting.py

@@ -14,7 +14,6 @@
 from sklearn.grid_search import GridSearchCV
 from sklearn.ensemble import AdaBoostClassifier
 from sklearn.ensemble import AdaBoostRegressor
-from sklearn.tree import DecisionTreeClassifier
 from sklearn.utils import shuffle
 from sklearn import datasets
 
@@ -60,8 +59,8 @@ def test_iris():
         clf = AdaBoostClassifier(algorithm=alg)
         clf.fit(iris.data, iris.target)
         score = clf.score(iris.data, iris.target)
-        assert score > 0.9, "Failed with criterion %s and score = %f" % \
-            (c, score)
+        assert score > 0.9, "Failed with algorithm %s and score = %f" % \
+            (alg, score)
 
 
 def test_boston():

sklearn/feature_extraction/dict_vectorizer.py

@@ -5,7 +5,6 @@
 from collections import Mapping, Sequence
 from operator import itemgetter
 
-import sys
 import numpy as np
 import scipy.sparse as sp