[issue26587] Possible duplicate entries in sys.path if .pth files are used with zip's

[Wolfgang Langner]

Wolfgang Langner added the comment:

I think a fix for 3.6 only is ok, because it changes behaviour.
But this is only an internal function with a "_".

Should I add a test with a temporary created pth file?

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<http://bugs.python.org/issue26587>
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