[issue27611] test_tix cannot import _default_root after test_idle

[Zachary Ware]

Zachary Ware added the comment:

I think there are two bugs to be fixed here:

1) as Serhiy said, if tix needs _default_root, it should use it as tkinter._default_root instead of importing it directly

2) test_idle should not permanently modify the tkinter namespace

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nosy: +zach.ware

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<http://bugs.python.org/issue27611>
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