It seems this version string was introduced in a upstream Debian patch indeed, when it was based on a prerelease version of Python 3.9. The patch (git-updates.diff) was dropped later.
Introduced (erroneously): https://salsa.debian.org/cpython-team/python3/-/commit/5334a0144db8e35afa8ae898d0dbd06afa426ccb Removed: https://salsa.debian.org/cpython-team/python3/-/commit/7952d9ce65aa51d6a23107ce1e30d0d92b1e15c7 Please backport the updated Debian-packaged Python 3.9 to Ubuntu. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905064 Title: "+" suffix in 3.9.0+ breaks pip To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python3.9/+bug/1905064/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
