Hi, I use Debian Stretch. Looks like the latest version of python3 is 3.5.3-1: https://packages.debian.org/stretch/python3.5 It has a bug biting me which was resolved quite some time ago: https://bugs.python.org/issue29519 Is there any idiomatic way to get the fix without damaging my 'stable' system? Apparently 3.5.3-2 contains it: http://metadata.ftp-master.debian.org/changelogs/main/p/python3.5/unstable_changelog -- Arseny Sher