ModuleNotFoundError: No module named 'osgeo'

Question

I have made a docker file that to run in Kubuntu 20.04.1 LTS. The problem is that I get this error:

ModuleNotFoundError: No module named 'osgeo'

I followed many tutorials such as this one: Installing libgdal-dev on Ubuntu 20.04 and more specific these commands:

sudo apt update
sudo apt install libpq-dev
sudo apt install gdal-bin
sudo apt install libgdal-dev

and many others, such as this one: https://stackoverflow.com/questions/29852857/no-module-named-osgeo-ogr

but nothing changed and I still face the same error. Any ideas on how to fix this?