From cf3178cd6f9b56d848db5c6d5da413a6dc17aa8c 2014-02-21 06:09:37
From: MinRK <benjaminrk@gmail.com>
Date: 2014-02-21 06:09:37
Subject: [PATCH] generate supported formats in ValueError
---

diff --git a/IPython/core/pylabtools.py b/IPython/core/pylabtools.py
index 938363c..01a0fb0 100644
--- a/IPython/core/pylabtools.py
+++ b/IPython/core/pylabtools.py
@@ -206,8 +206,9 @@ def select_figure_formats(shell, formats, **kwargs):
     supported = {'png', 'png2x', 'retina', 'jpg', 'jpeg', 'svg', 'pdf'}
     bad = formats.difference(supported)
     if bad:
-        s = "{%s}" % ",".join([repr(f) for f in bad])
-        raise ValueError("supported formats are: 'png', 'retina', 'svg', 'jpg', 'pdf' not %s" % s)
+        bs = "%s" % ','.join([repr(f) for f in bad])
+        gs = "%s" % ','.join([repr(f) for f in supported])
+        raise ValueError("supported formats are: %s not %s" % (gs, bs))
     
     if 'png' in formats:
         png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))