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After installing python using python installer, the following directory exists and contains about 28 *.pkc files that should not be there. Maybe the 'cachedir' itself should be cleaned up too. install_dir\python1\jython-2.5\cachedir\packages\*.pkc
Not sure it is still relevant with the current version. Closing this as old bug. If this is still a thing, please reopen and accept my apologies.
Thanks for your evaluation Julien. Reporter, if you think your issue is still valid and needs to be addressed, don't hesitate to reopen it with additional information. Closing for now.