Python3.5 in jessie?

Question

Python

I debugged my code inside the ubuntu lxc container. Then I created a container with jessie on the production server. added

% cat /etc/apt/sources.list | grep back
deb [arch=amd64] http://mirror.yandex.ru/debian jessie-backports main contrib non-free

I'm doing an update. I make sure through the site that there is a python3.5 package in testing:
Exact hits

Package python3.5
stretch (testing) (python): Interactive high-level object-oriented language (version 3.5)
3.5.3-1: amd64 arm64 armel armhf i386 mips mips64el mipsel ppc64el s390x

But I can't find it in the backports.

% apt -t jessie-backports search python-3.5
Sorting... Done
Full Text Search... Done

It turns out that the required package is in testing, but it is not in the backports. How to be in such a situation? It is necessary to install 3.5 in the system in the best way using regular means.

Answer 1

There is a "Pinning" mechanism for this , the main thing is to remember that in the available versions of the packages, incl. from the added repositories with a lower priority and do not update manually what is possible with a simple one apt upgrade, apt understands itself perfectly.