[issue16957] shutil.which() shouldn't look in working directory on unix-y systems

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I think it should be

    if os.path.dirname(cmd) and _access_check(cmd, mode):

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nosy: +hynek, serhiy.storchaka, tarek

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<http://bugs.python.org/issue16957>
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