Install Python 3.10.x on Ubuntu 20.04

README.md

Prerequisite

sudo apt update
sudo apt install software-properties-common -y

Add custom APT repository

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

Press ENTER to confirm adding repository.

Install Python 3.10

sudo apt install python3.10 python3.10-venv python3.10-dev
python3 --version

You will see previous of Python. At the writing time Python 3.8.10

Make symbolic link (Optional)

Caution

This may cause problem with terminal not open on Ubuntu

https://askubuntu.com/questions/1397938/terminal-not-opening-after-changing-python-version

ls -la /usr/bin/python3
sudo rm /usr/bin/python3
sudo ln -s python3.10 /usr/bin/python3
python3 --version

Now you will see Python 3.10.x

Install PIP for Python 3.10

curl -sS https://bootstrap.pypa.io/get-pip.py | python3.10
python3.10 -m pip --version

Test with system ENV

python3.10 -m pip install ipython

Test with Virtual ENV

python3.10 -m venv venv
pip install ipython

References

https://computingforgeeks.com/how-to-install-python-on-ubuntu-linux-system/

I followed the procedure, and it works on the ARM Linux platform. Here’s an extra tip: if your system's default Python version is 3.9 instead of 3.8, you may encounter errors because the procedure strictly requires Python 3.8. In that case, switch the default Python to version 3.8 or manually edit /usr/bin/add-apt-repository to #!/usr/bin/python3.8 as a work around.

$ sudo add-apt-repository ppa:deadsnakes/ppa                               
[sudo] password for dev:                                                                                                      
Traceback (most recent call last):                                                                                            
  File "/usr/bin/add-apt-repository", line 12, in <module>                                                                    
    from softwareproperties.SoftwareProperties import SoftwareProperties, shortcut_handler                                    
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 68, in <module>                        
    from gi.repository import Gio                                                                                             
  File "/usr/lib/python3/dist-packages/gi/__init__.py", line 42, in <module>                                                  
    from . import _gi                                                                                                         
ImportError: cannot import name '_gi' from partially initialized module 'gi' (most likely due to a circular import) (/usr/lib/
python3/dist-packages/gi/__init__.py)

A good alternative I found to the symlink that won't break the terminal is to set alias python3=python3.10 in your bashrc or bash_aliases

curl -sS https://bootstrap.pypa.io/get-pip.py | python3.10 -> no modules name "apt_pkg" help me

Make sure you install python3-apt by following command.

sudo apt install python3-apt

I tried but still get the error "apt_pkg"

i used https://stackoverflow.com/a/59786894 to resolve it