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Mon Nov 6 04:08:42 CET 2006 · http://mail.python.org/pipermail/python-dev/2006-November/069855.html

On Nov 4, 2006, at 3:49 AM, Martin v. Löwis wrote:

> Notice that at least the following objects are shared between
> interpreters, as they are singletons:
> - None, True, False, (), "", u""
> - strings of length 1, Unicode strings of length 1 with ord < 256
> - integers between -5 and 256
> How do you deal with the reference counters of these objects?
>
> Also, type objects (in particular exception types) are shared between
> interpreters. These are mutable objects, so you have actually
> dictionaries shared between interpreters. How would you deal with  
> these?

All these should be dealt with by making them per-interpreter  
singletons, not per address space. That should be simple enough,  
unfortunately the margins of this email are too small to describe  
how. ;) Also it'd be backwards incompatible with current extension  
modules.

James

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Py_NewInterpreter to create separate GIL (branch)