Merge pull request #9439 from cgohlke/patch-10

Kojoley · web-flow · commit 7faf9504c1d5 · 2017-10-16T21:55:26.000+03:00
Fix undefined variable 'warnings'
diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -11,6 +11,8 @@
 from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 
+import warnings
+
 import six
 from six.moves import zip
 try:
