Howdoi python3.8?

installer-py

# Prerequsitis
sudo apt-get install build-essential checkinstall
sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev libffi-dev zlib1g-dev
# Prerequsitis

# downlaod, extract
sudo wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz
sudo tar xzf Python-3.8.0.tgz

# build
cd Python-3.8.0
sudo ./configure --enable-optimizations
sudo make altinstall

# check
python3.8 -V
# >>> Python-3.8.0

# clear bs
sudo rm -f Python-3.8.0.tgz


# thanks to: https://tecadmin.net/install-python-3-8-ubuntu/