Merge pull request scikit-learn#5886 from sieben/with_statement

[MRG+1] Use with to handle file

Author: amueller

benchmarks/bench_plot_randomized_svd.py

@@ -117,11 +117,9 @@
 big_sparse_datasets = ['big sparse matrix', 'rcv1']
 
 
-def unpickle(file):
-    fo = open(file, 'rb')
-    dict = pickle.load(fo, encoding='latin1')
-    fo.close()
-    return dict['data']
+def unpickle(file_name):
+    with open(file_name, 'rb') as fo:
+        return pickle.load(fo, encoding='latin1')["data"]
 
 
 def handle_missing_dataset(file_folder):