Python 3.9 on Ubuntu 22.04 LTS

install-python-3.9.12.sh

#!/bin/sh
## Helper file for supporting Ubuntu 22.04LTS for MATTER(formerly CHIP) development

# Install build dependencies
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev

# Download and extract source
cd /tmp/
wget https://www.python.org/ftp/python/3.9.12/Python-3.9.12.tgz
tar xzf Python-3.9.12.tgz
cd Python-3.9.12

# Configure and build
sudo ./configure --prefix=/opt/python/3.9.12/ --enable-optimizations --with-lto --with-computed-gotos --with-system-ffi --enable-shared
sudo make -j "$(nproc)"
sudo ./python3.9 -m test -j "$(nproc)"
sudo make altinstall
sudo rm /tmp/Python-3.9.12.tgz

# Install pip
sudo /opt/python/3.9.12/bin/python3.9 -m pip install --upgrade pip setuptools wheel

# Easy usage
sudo ln -s /opt/python/3.9.12/bin/python3.9        /opt/python/3.9.12/bin/python3
sudo ln -s /opt/python/3.9.12/bin/python3.9        /opt/python/3.9.12/bin/python
sudo ln -s /opt/python/3.9.12/bin/pip3.9           /opt/python/3.9.12/bin/pip3
sudo ln -s /opt/python/3.9.12/bin/pip3.9           /opt/python/3.9.12/bin/pip
sudo ln -s /opt/python/3.9.12/bin/pydoc3.9         /opt/python/3.9.12/bin/pydoc
sudo ln -s /opt/python/3.9.12/bin/idle3.9          /opt/python/3.9.12/bin/idle
sudo ln -s /opt/python/3.9.12/bin/python3.9-config      /opt/python/3.9.12/bin/python-config

# Alternate install
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.10 1
sudo update-alternatives --install /usr/bin/python python /opt/python/3.9.12/python3.9 2

# (Optional)
sudo update-alternatives --config python
python --version

## REFERENCES
## https://www.build-python-from-source.com/
## https://towardsdatascience.com/installing-multiple-alternative-versions-of-python-on-ubuntu-20-04-237be5177474
## https://www.linuxcapable.com/how-to-install-python-3-9-on-ubuntu-22-04-lts/