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How to upgrade to Python 3.10 on Ubuntu 18.04 and 20.04 LTS


In this article, we will upgrade to python 3.10 and configure it as the default version of python in Ubuntu 18.04 and 20.04 LTS.

The current stable version of python was released on 06 Dec. 2021. Many ubuntu users are facing problems during upgrading python to the latest version. Python 3.9 is available as default when we install Ubuntu 20.04 LTS and Python 3.8 is available in Ubuntu 18.04. Python 3.10.0 is not available in default Ubuntu 18.04 and 20.04 repositories.

So let’s start with checking the currently installed version of Python on your system.

python3 -V

As seen in the image above, my currently installed Python version is 3.8.10 but yours may differ.

Install Python 3.10

Follow the simple steps to install and configure Python 3.10

Step 1: Add the repository and update

Latest Python 3.10 is not available in Ubuntu’s default repositories. So, we have to add an additional repository. On launchpad repository named deadsnakes is available for Python Packages.

Add the deadsnakes repository using the below commands.

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update

Update the package list using the below command.

apt-get update

Verify the updated Python packages list using this command.

apt list | grep python3.10

As seen in the image above, Now we have Python 3.10 available for installation.

Step 2: Install the Python 3.10 package using apt-get

install Python 3.10 by using the below command :

sudo apt-get install python3.10

Step 3: Add Python 3.8 & Python 3.10 to update-alternatives

Add both old and new versions of Python to Update Alternatives.

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 1
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 2

Step 4: Update Python 3 for point to Python 3.10

By default, Python 3 is pointed to Python 3.8. That means when we run python3 it will execute as python3.8 but we want to execute this as python3.10.

Type this command to configure python3:

sudo update-alternatives --config python3

You should get the above output. Now type 2 and hit enter for Python 3.10. Remember the selected number may differ so choose the selection number which is for Python 3.10.

Step 5: Test the version of python

Finally, test the current version of python by typing this :

python3 -V

You should get Python 3.10 as output.

In this article, we learn how to upgrade python to the latest version that is 3.10 in Ubuntu 20.04 and 18.10.

Share your thoughts in the comment section. Happy Learning …!!

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