Hi,

Update to my recent email: perhaps it would make sense to handle the
'color' argument in the same way, allowing hollow bars.  Combined patch
below.

Ben.



--- ORIG-axes.py        2010-07-06 15:43:35.000000000 +0100
+++ NEW-axes.py 2010-08-09 09:39:44.000256000 +0100
@@ -4575,15 +4575,17 @@
         if len(linewidth) < nbars:
             linewidth *= nbars

-        if color is None:
-            color = [None] * nbars
+        if (color is None
+            or (is_string_like(color) and color.lower() == 'none')):
+            color = [color] * nbars
         else:
             color = list(mcolors.colorConverter.to_rgba_array(color))
             if len(color) < nbars:
                 color *= nbars

-        if edgecolor is None:
-            edgecolor = [None] * nbars
+        if (edgecolor is None
+            or (is_string_like(edgecolor) and edgecolor.lower() == 'none')):
+            edgecolor = [edgecolor] * nbars
         else:
             edgecolor = list(mcolors.colorConverter.to_rgba_array(edgecolor))
             if len(edgecolor) < nbars:

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