Perhaps you can clarify what exactly you want to do. I can see at least 2 distict cases 1. Multithreaded web server (or even browser) * interpreters need separate imports at least pure python modules should be loaded and unloaded, different versions of same python modules could be used by different interpreters if different versions of C extensions are needed, different dynamic loading might be needed btw, is it still the case that C extensions cannot be unloaded? * interpreters need separate memory regions so that individual interpreters can be killed quickly 2. Long-running process that executes many small independent user scripts (e.g. phone) * memory could be shared as long as cross-references are forbidden garbage collector hopefully kill circular references after interpreter is terminated * long-running process might want to reload a C extension, ouch * a possible workaround would be execute only one interpreter at a time, somehow pickling user script state?
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Dima Tisnek