[Michael Hudson]
I've been looking at this area partly to try and understand this bug:
[ 1163563 ] Sub threads execute in restricted mode
but I'm not sure the whole idea of multiple interpreters isn't inherently doomed :-/
[Martin v. Löwis]
That's what Tim asserts, saying that people who want to use the feature should fix it themselves.
I haven't said they're doomed, although I have said that people who want to use them are on their own. I think the latter is simply an obvious truth, since (a) multiple interpreters have been entirely unexercised by the Python test suite ("if it's not tested, it's broken" rules); (b) Python developers generally pay no attention to them; and (c), as the teensy bit of docs for them imply, they're an "80% solution", but to a problem that's probably more sensitive than most to glitches in the other 20%. I've also said that Mark's thread state PEP explicitly disavowed responsibility for working nicely with multiple interpreters. I said that only because that's what his PEP said <wink>.