[issue25755] Test test_property failed if run twice

[Berker Peksag]

Berker Peksag added the comment:

Thanks for the patch, Nan. I've updated your patch to apply Serhiy's advice.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.5

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<http://bugs.python.org/issue25755>
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