[issue19610] Give clear error messages for invalid types used for setup.py params (e.g. tuple for classifiers)

[Berker Peksag]

Berker Peksag <berker.peksag at gmail.com> added the comment:

(Sorry, I messed up fields in the issue.)

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nosy: +ned.deily
priority: normal -> release blocker

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue19610>
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