Updating from Python 3.5.2 to Python 3.8 using deadsnakes PPA is not working on Ubuntu 16.04 LTS-CodePudding

I can't update Python on Ubuntu 16.04 LTS from my Python 3.5.2 to 3.8. I found an existing post

CodePudding user response：

My ubuntu did not have the latest pre-built packages so I had to install from source according to the following guide: here.

sudo apt update
sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev libsqlite3-dev wget libbz2-dev
wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz
tar -xf Python-3.8.0.tgz
cd Python-3.8.0
./configure --enable-optimizations
make -j 8
sudo make altinstall