How do I install python 3.6.5 on my Ubuntu 19.10 that already contains python 3.7.5?

Question

I will accept two possible solutions:

Just take it from an older release. That was you get proper Ubuntu package. Don't mess with the system via hacks. https://packages.ubuntu.com/bionic/python3.6-minimal — Dirk Eddelbuettel, Jan 01 '20 at 20:04
You cannot uninstall python 3.7 in ubuntu 19.10, that is a critical system component. — Antti Haapala -- Слава Україні, Jan 01 '20 at 20:07
There is a ppa (https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa) for getting any somewhat sensible python version into LTS releases. Unfortunately 19.10 is not an LTS release. — Antti Haapala -- Слава Україні, Jan 01 '20 at 20:09
It doesn't matter, that still helps and is close to my earlier comment: you can code from an _earlier_ PPA on a later release. Just not the inverse. — Dirk Eddelbuettel, Jan 01 '20 at 20:50

René Höhle · Answer 1 · 2020-01-01T20:14:04.600

1

For this you can use pyenv.

If you have installed all packages and dependencies you can install different version like this:

pyenv install -v 3.6.5

edited Jan 01 '20 at 20:14

answered Jan 01 '20 at 20:03

René Höhle

Right i use normally pyenv but found the other solution. – René Höhle Jan 01 '20 at 20:14

score 0 · Answer 2 · answered Aug 09 '23 at 11:06

You can install another python version side by side.

You can see https://www.python.org/ftp/python/ to get a link of your desired version of python. Then download and install.

Here are possible steps

Run sudo apt install build-essential libssl-dev openssl to install dependencies need for compiling
Run wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz to downlaod
Run tar -xf Python-3.6.5.tgz to extract
Run cd Python-3.6.5 to get into code directory
Run ./configure to configure and generate the necessary build files
Run make to compile
Run sudo make install to finally install

New version is installed and available to use.

2 Answers2