Hi, I think I understood the issue, for the no module found error sometimes you need to clean the apt list , something like below: 

%sh
rm -r /var/cache/apt/archives/* /var/lib/apt/lists/*
sudo apt-get clean
sudo apt-get update
sudo add-apt-repository -y ppa:ubuntugis/ppa && apt-get update
sudo apt-get install -y gdal-bin libgdal-dev (or gdal*)