How to Upgrade to Python 3.7 on Ubuntu 18.x

In this article, we will guide you to upgrade python 3.6 to python 3.7. Additionally, we will also show you to how you can switch between 3.6 and 3.7.

Step 1: Check the current version

Run the following command to verify the current version of python.

$ python3 --version

Output:

python 3.6.9

Step 2: Python 3.7 Installation

Run the following commands to install python 3.7

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$ sudo apt update -y
$ sudo apt install python3.7

Step 3: Add python 3.6 and 3.7 to update-alternatives

$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 1
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.7 2

Step 4: Pointing to python 3.7

Run the following command to point to python 3.7 (or 3.6)

$ sudo update-alternatives --config python3

Output:

There are 2 choices for the alternative python3 (providing /usr/bin/python3).
Selection Path Priority Status
0 /usr/bin/python3.6 1 auto mode
1 /usr/bin/python3.6 1 manual mode
2 /usr/bin/python3.7 2 manual mode
Press to keep the current choice[*], or type selection number:

Use “2” to point to python 3.7 and use”1″ to point to python 3.6. The selection might be little bit different on your system.

Under the hood, it uses sym-links to point to the selected version of python.


Step 4: Check the python version

$ python3 --version

Congrats! You are done!