bpo-19610: setup() now raises TypeError for invalid types by berkerpeksag · Pull Request #4519 · python/cpython (original) (raw)
There is no "string to list" test but "tuple to list" test for classifiers: test_classifier_invalid_type
I think that covers the following branch:
if not isinstance(value, list): ...
And since the implicit "string to list" conversation only happens for 'keywords' and 'platforms' fields, I think we're good to go.
Please feel free to send another PR or an example if I misunderstand your comment, thanks!