Ned Deily <n...@acm.org> added the comment:

After further investigation, on OS X at least, there is a difference in 
behavior between Tk 8.4 (the system default on OS X 10.4 and 10.5) and Tk 8.5 
(the default on 10.6).  Lib/tkinter/font.py calls the Tk "font names" commands 
to check whether a font is already defined.  At the point where test_font.py is 
initially run, there has not been any real Tk activity yet.  For some reason, 
with 8.5 the system font names are returned; with 8.4 they are not:

$ /usr/bin/wish8.4
% font names
$ /usr/bin/wish8.5
% font names
systemPushButtonFont systemMenuItemFont systemApplicationFont systemSystemFont 
systemMenuItemMarkFont TkMenuFont TkDefaultFont systemSmallEmphasizedSystemFont 
systemDetailEmphasizedSystemFont systemMiniSystemFont TkHeadingFont 
TkTooltipFont systemUtilityWindowTitleFont systemViewsFont 
systemSmallSystemFont systemMenuTitleFont systemEmphasizedSystemFont TkTextFont 
systemDetailSystemFont TkCaptionFont systemLabelFont systemAlertHeaderFont 
systemMenuItemCmdKeyFont TkSmallCaptionFont TkFixedFont systemWindowTitleFont 
systemToolbarFont TkIconFont

So, a solution for that is to add a try block in test_font.py to create a font 
definition for TkDefaultFont if it does not already exist.  (Presumably, after 
the test failed and before it was re-run, other tests ran which caused the 
fonts to be defined so it passes.)  This time I have tested it with both Tk 8.4 
and 8.5 on OS X 10.5 and 10.6.  Additional patch file attached (to be applied 
on top of the already applied first patch).

----------
assignee: ned.deily -> 
resolution: fixed -> accepted
stage: committed/rejected -> patch review
Added file: http://bugs.python.org/file19130/issue9899-fix1-py3k.patch

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<http://bugs.python.org/issue9899>
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