N
# first do:
sudo apt-get update
# after do:
sudo apt-get install python3.6
# then it should be installed
N
sudo apt-get install python3.7
N
Install the dependencies files to build Python. ...
Download the latest Python stable source code. ...
Extract the Python 3.9. ...
Run the configure script. ...
Build the Python 3.9.1. ...
Install the Python 3.9.1. ...
Verify the Python 3.9