[issue39551] mock patch should match behavior of import from when module isn't present in sys.modules

[Chris Withers]

Chris Withers <chris at withers.org> added the comment:

I'm afraid I don't understand "immutable package which doesn't allow it's children to be published on it", can you give an example?

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39551>
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