[issue16817] test___all__ has to save and restore sys.modules while it does all the importing

[Eli Bendersky]

Eli Bendersky added the comment:

David, how would this help pickle not find _elementtree though? It's already in sys.modules *before* fresh_import is used, because test___all__ put it there.

I'm experimenting with just deleting _elementtree from sys.modules before running the tests, so far with little success.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16817>
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