In an effort to try and fix some of the ecosystem before python3.10 (or 4.0) is a thing, I figured I'd set up a build where the version is bumped and see what's broken.

If you're interested in reproducing my findings, I've included a build that's installable in ubuntu in this PPA: https://launchpad.net/~asottile/+archive/ubuntu/python3.10

It's mostly based on this patch: https://github.com/asottile/python3.10/blob/ubuntu/bionic/debian/patches/0029-pretend-3.10.patch

while tracking down why pip doesn't work, I've encountered the following from doing this:

$ python3.10 -c 'import sys; print(sys.path)'
['', '/usr/lib/python31.zip', '/usr/lib/python3.10', '/usr/lib/python3.10/lib-dynload', '/usr/lib/python3/dist-packages']


notably, the second `sys.path` entry appears incorrect and should probably be `/usr/lib/python310.zip`

this should be an easy fix:

https://github.com/python/cpython/blob/1b3892243433da7eae7f5f3a4f98f13d309c8926/Modules/getpath.c#L1019-L1028

via https://github.com/python/cpython/commit/b4d4aef8433da2657c8d80207686124d15d32054

New changeset 2a561b5f6830aee39cf05dc70c24e26c3558dda0 by Pablo Galindo in branch 'master':
bpo-37616: Handle version information more gracefully in getpath.c (GH-20214)
https://github.com/python/cpython/commit/2a561b5f6830aee39cf05dc70c24e26c3558dda0