[issue30097] Command-line option to suppress "from None" for debugging

[STINNER Victor]

STINNER Victor added the comment:

See also my old PEP 490 -- Chain exceptions at C level, more or less abandonned :-p

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nosy: +haypo, ncoghlan

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30097>
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