[issue22696] Add a function to know about interpreter shutdown

[Antoine Pitrou]

Antoine Pitrou added the comment:

> Are there other special interpreter states about which it would by 
> helpful to know? Interpreter initializing, garbage collecting, signal 
> handling?

- interpreter initializing: user code generally isn't executed in that phase
- garbage collecting: there are already garbage collection callbacks
- signal handling: well... I don't see why that would be useful

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22696>
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