[issue21720] "TypeError: Item in ``from list'' not a string" message

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Serhiy's PR avoids the cryptic BytesWarning on Py3 while minimising the overhead of the new typecheck, so I've closed Berker's PR in favour of that one (which now has approved reviews from both Brett and I, so Serhiy will merge it when he's ready to do so).

Thanks for both patches!

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