swc-installation-test-2.py: Don't print duplicate exceptions
authorW. Trevor King <wking@tremily.us>
Sun, 30 Dec 2012 16:43:47 +0000 (11:43 -0500)
committerW. Trevor King <wking@tremily.us>
Tue, 1 Jan 2013 14:49:46 +0000 (09:49 -0500)
commit9ec5693608feb3db4bc14de8d327f9b524a80a14
tree3c5f4f29b34bd9c136f3820cc9ce057ee68aeb5f
parentaca0fb812c1566b436a4d8c8904a60f142444e8b
swc-installation-test-2.py: Don't print duplicate exceptions

For example, if you have an outdated 'python', you only want to hear
about that once, not once for each PythonPackageDependency.
swc-installation-test-2.py