On 07/06/2010 09:11 PM, Aahz wrote: > In article <4a3f0ca7-fef0-4f9c-b265-5370e61ed...@d8g2000yqf.googlegroups.com>, > moerchendiser2k3 <googler.1.webmas...@spamgourmet.com> wrote: >> Aahz: >>> >>> Set sys.path to include each script's base dir before running it, then >>> restore after each script. >> >> That works, but doesnt solve the problem. >> >> ScriptA.py has a module in its directory called 'bar.py' >> ScriptB.py has a module in its directory called 'bar.py' >> >> Imagine the 'bar.py' modules dont have the same content, so they are >> not equal. >> >> Now when the first bar.py is imported, the second import for a "import >> bar" imports the first one, because its already stored in sys.modules. > > Good point, you'll need to save/restore sys.modules, too. That gets you > 90-95% of complete namespace separation; if you need more than that, your > best bet is to use separate processes. Full-blown namepace isolation is > a *hard* problem, just look at all the past attempts to create secure > Python (and what you're trying to do is roughly equivalent).
I believe Python (at least in the 3.x series) supports multiple interpreter instances per process. -- http://mail.python.org/mailman/listinfo/python-list
