[issue44717] Improve AttributeError on circular imports of submodules

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:

There is a buildbot failure after merging this PR:

https://buildbot.python.org/all/#/builders/464/builds/574

If is not fixed in 24 we will need to revert per our buildbot policy

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resolution: fixed -> 
status: closed -> open

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<https://bugs.python.org/issue44717>
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