reduce() isn't built-in in py3k. go figure...

WeatherGod · WeatherGod · commit 5a3ce17327fd · 2015-08-23T13:23:03.000-04:00
diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
@@ -18,6 +18,7 @@
 
 from matplotlib.externals import six
 
+from functools import reduce
 import operator
 import os
 import warnings
