Bug in how supported filetypes are found.

astropy-buildbot · astropy-buildbot · commit 85f94116c1af · 2011-03-22T17:49:08.000-07:00
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -1829,7 +1829,7 @@ def _print_method(*args, **kwargs):
 
         if (format not in self.filetypes or
             not hasattr(self, method_name)):
-            formats = self.filetypes.iterkeys()
+            formats = self.filetypes.keys()
             formats.sort()
             raise ValueError(
                 'Format "%s" is not supported.\n'
