The specific reason cache_tag is mandatory is so that importlib can rely on it. Setting it to None for a given implementation will automatically disable caching of bytecode files. -- Sent from my phone, thus the relative brevity :) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-dev/attachments/20120512/0505361b/attachment.html>