[issue15767] add ModuleNotFoundError

[Roundup Robot]

Roundup Robot added the comment:

New changeset 8a0ed9f63c6e by Brett Cannon in branch 'default':
Issue #15767: Introduce ModuleNotFoundError, a subclass of
http://hg.python.org/cpython/rev/8a0ed9f63c6e

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15767>
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