New submission from Serhiy Storchaka:
ImportError.__init__ sets only specified attributes ("msg", "name" or "path"),
and left not explicitly specified attributes unchanged.
>>> err = ImportError('test', name='name')
>>> err.args, err.msg, err.name, err.path
(('test',), 'test', 'name', None)
>>> err.__init__(path='path')
>>> err.args, err.msg, err.name, err.path
((), 'test', 'name', 'path')
In above example err.__init__(path='path') sets attributes "args" and "path",
but not "msg" and "name".
I'm not sure whether can this be considered as a bug.
----------
components: Interpreter Core
messages: 277533
nosy: brett.cannon, eric.snow, ncoghlan, serhiy.storchaka
priority: normal
severity: normal
status: open
title: ImportError.__init__ doesn't reset not specified exception attributes
versions: Python 3.5, Python 3.6, Python 3.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue28289>
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