[issue19469] Duplicate namespace package portions (but not on Windows)

[Eric Snow]

New submission from Eric Snow:

In changeset 88c3a1a3c2ff you'll find in test_api.py where I threw together a __path__ to compare against the one I was getting (which had 2 identical entries) on my Ubuntu 12.04 workstation.  The XP buildbot (http://buildbot.python.org/all/builders/x86%20XP-4%203.x) took issue with that (but non-windows was fine).

I was able to work around the difference (78d36d54391c), but I find the extra namespace portions surprising.  I'd like to get to the bottom of it.  I expect it has to do with how path entries are done on Windows, or perhaps with the way support.temp_cwd() iteracts with sys.path during testing.

----------
messages: 201880
nosy: brett.cannon, eric.smith, eric.snow
priority: normal
severity: normal
stage: test needed
status: open
title: Duplicate namespace package portions (but not on Windows)
type: behavior
versions: Python 3.4

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<http://bugs.python.org/issue19469>
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