DOC: Ensure arrow demo is plotted in consistent order.

QuLogic · QuLogic · commit 1856ca3d9a8f · 2016-01-02T02:35:47.000-05:00
diff --git a/examples/pylab_examples/arrow_demo.py b/examples/pylab_examples/arrow_demo.py
@@ -214,7 +214,7 @@ def draw_arrow(pair, alpha=alpha, ec=ec, labelcolor=labelcolor):
         plt.text(x, y, label, size=label_text_size, ha='center', va='center',
              color=labelcolor or fc)
 
-    for p in positions.keys():
+    for p in sorted(positions):
         draw_arrow(p)
 
 # test data
