gh-145633: Fix struct.pack('f') on s390x (#146422)

Use PyFloat_Pack4() to raise OverflowError.
Add more tests on packing/unpacking floats.

Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>

Victor Stinner committed 1mo ago

8de70b31c59b1d572d95f8bb471a09cfe4cd2b13

Parent: 1038a3a

Committed by GitHub <noreply@github.com> on 3/26/2026, 11:12:49 AM