I am currently on ubuntu 18.04.
My default python version is Python 3.7.9
I wanted to upgrade it to Python 3.9.2 and set it as default python version
How do I do that ?
2 Answers
Install Python normally with the deadsnake PPA:
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.9
Check if you can access Python:
python3.9 --version
If so, create a symlink to set it as "default":
sudo mv /usr/bin/python /usr/bin/python3.7
sudo ln -s $(which python3.9) /usr/bin/python
6 Comments
bad_coder9042093
sudo apt install python3.9 this doesn't workbad_coder9042093
This is the error I am getting
E: Unable to locate package python3.9 E: Couldn't find any package by glob 'python3.9' 
Heliton Martins
Did you run
sudo apt update? If so, maybe it's just not available for 18.04.bad_coder9042093
Yeah I have done
sudo apt update. Still the samebad_coder9042093
But this doesn't change the default python When I run
python --version its still showing 3.7.9 |
If you don't have it in apt then you can add special repo deadsnakes Python repo for Ubuntu.
And after adding repo you should have all versions in apt form 2.3 to 3.10
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt install python3.9
And later you can find path to actuall version
which python
and replace is with python3.9 which you can also find with
which python3.9
But sometimes it is not good idea to replace it because system may need older version and it will not work with newer one. I prefer to use python3.9 when I need 3.9 and python3.7 when I really need 3.7.
After adding this repo it will also inform you when there will be newer version 3.9.x
This repo works also in Linux Mint which is based on Ubuntu.
aptthen you can add special repo for Ubuntu deadsnakes Python repo for Ubuntu . And after adding repo you should have all versions inapt