Author jeff.allen
Recipients jeff.allen, stefan.richthofer, wymannmi, zyasoft
Date 2017-01-31.23:41:26
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Looking again at your explanation of the cause in ...
# windows detection, covers cpython and ironpython
WINDOWS = (sys.platform.startswith("win") or
           (sys.platform == 'cli' and == 'nt'))

I notice that the version of pip installed by Jython 2.7.0 is older than this, and does its Windows detection in-line in, where the error arises. In this version there is some Jython-specific detection, but not consistently. Maybe idea #1 is feasible (fix pip).
Date User Action Args
2017-01-31 23:41:27jeff.allensetmessageid: <>
2017-01-31 23:41:27jeff.allensetrecipients: + jeff.allen, zyasoft, stefan.richthofer, wymannmi
2017-01-31 23:41:27jeff.allenlinkissue2521 messages
2017-01-31 23:41:26jeff.allencreate