We of the core dev community commit to supporting Python releases for five years. Releases get eighteen months of active bug fixes, followed by three and a half years of security fixes. Python 3.4 turns 5 next March--at which point we'll stop supporting it, and I'll retire as 3.4 release manager.
My plan is to make one final release on or around its fifth birthday containing the last round of security fixes. That's about seven months from now. Nothing has been merged since the releases of 3.4.9 and 3.5.6 last week, and there are no open PRs against either of those releases.
But! There are still a couple languishing "critical" bugs:
"shutil copy* unsafe on POSIX - they preserve setuid/setgit bits"
https://bugs.python.org/issue17180
"XML vulnerabilities in Python"
https://bugs.python.org/issue17239
"fflush called on pointer to potentially closed file" (Windows only)
https://bugs.python.org/issue19050It'd be nice to resolve all those issues, one way or another, before we retire 3.4.
See you next March,
//arry/