CODEWITHSUNDEEP
pythonubuntu
Hansen Gianto
Hansen Gianto

Reputation: 491

How can I install Python 3.9 on a Linux Ubuntu terminal?

I tried apt install python 3.9 and it replied:

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3.9
E: Couldn't find any package by glob 'python3.9'
E: Couldn't find any package by regex 'python3.9'

Upvotes: 49

Views: 99867

Answers (3)

4.12.22.4.18.0.
4.12.22.4.18.0.

Reputation: 142

I have spent a long time searching for this but found the answer here first: https://github.com/baralraj/python-3.9-on-wsl/blob/main/README.md

1st: Update and install some required packages that are needed to build python from source.

sudo apt update
sudo apt upgrade
sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget

2nd: Create a temp directory, download the python source code and unzip (I usually just download it manually from that url in the browser and unzip it with the files UI)

mkdir ~/tmp
cd ~/tmp
wget https://www.python.org/ftp/python/3.9.12/Python-3.9.12.tgz
tar -xvzf Python-3.9.12.tgz

3rd: Configure and install

cd Python-3.9.12
./configure
sudo make altinstall

4th: check the installation

python3.9 --version

Output should be

Python 3.9.12

Upvotes: 0

Will
Will

Reputation: 480

You are getting that error because you first need to update the package list and the prerequisites.

sudo apt update
sudo apt install software-properties-common

Then, add the repository ppa:deadsnakes/ppa to your sources list (where you will download Python from)

sudo add-apt-repository ppa:deadsnakes/ppa

Make sure to press Enter when prompted. Then update available the packages:

sudo apt update

Lastly, install the version of your choice:

sudo apt install python3.9

Make sure to read this:

Disclaimer: there's no guarantee of timely updates in case of security problems or other issues. If you want to use them in a security-or-otherwise-critical environment (say, on a production server), you do so at your own risk.

PPA Deadsnake

Upvotes: 40

Akash Kumar
Akash Kumar

Reputation: 939

If you are on Ubuntu 19.10 (Eoan Ermine) (or any other version unsupported by the deadsnakes PPA), you will not be able to install using the deadsnakes PPA.

What you can do instead, is get the source from Python's official website, and install it manually, as described here.

To do so, first, install the dependencies required to build the Python package.

sudo apt install build-essential zlib1g-dev \
libncurses5-dev libgdbm-dev libnss3-dev \
libssl-dev libreadline-dev libffi-dev curl software-properties-common

Then download the tarball and extract it:

wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tar.xz
tar -xf Python-3.9.0.tar.xz

Then cd to the extracted directory:

cd Python-3.9.0

Now configure the script:

./configure

Now, to install Python 3.9 alongside your current Python installation (if any), use:

sudo make altinstall

Lastly, you can verify your installation using

python3.9 --version

How to make python3.X default of Python 3? (Optional)

rm /usr/bin/python3
ln -s /usr/bin/python3.5 /usr/bin/python3
  • create an alias in ~/.bash_aliases, ~/.zshrc, etc.
alias python3='/usr/bin/python3.9'

or

alias python3='/usr/local/bin/python3.9'

Upvotes: 82

Related Questions