[issue40600] Add option to disallow > 1 instance of an extension module

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

I'm not 100% sure that preventing to create multiple module instances is needed. For the atexit module, another solution is to move the "module state" into the interpreter, as it has been done for other modules like _warnings.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40600>
_______________________________________