[issue42100] Add _PyType_GetModuleByDef

[Petr Viktorin]

New submission from Petr Viktorin <encukou at gmail.com>:

I would like to add an internal _PyType_GetModuleByDef function to unblock further work on isolating extension modules, as discussed here: https://mail.python.org/archives/list/capi-sig@python.org/thread/T3P2QNLNLBRFHWSKYSTPMVEIL2EEKFJU/

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messages: 379163
nosy: petr.viktorin
priority: normal
severity: normal
status: open
title: Add _PyType_GetModuleByDef

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42100>
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