sudo apt-get update    
sudo apt-get install -y build-essential tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev libffi-dev
wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz    
sudo tar zxf Python-3.8.0.tgz
cd Python-3.8.0
sudo ./configure --enable-optimizations
sudo make -j 4python3.8 -V
sudo make altinstall
python3.8 -V
echo "alias python=/usr/local/bin/python3.8" >> ~/.bashrc
source ~/.bashrc
python -V