Install latest python version from python.org / atp install

install_python_apt.sh

#!/bin/bash

# Inspired by: https://linuxcapable.com/install-python-3-12-on-ubuntu-linux/

# Function to get the latest stable Python version
get_latest_stable_python_version() {
    # Fetch the HTML content and store it in a variable
    HTML_CONTENT=$(curl -s --compressed https://www.python.org/downloads/ | tr -d '\0')

    # Check if HTML_CONTENT is empty
    if [ -z "$HTML_CONTENT" ]; then
        echo "Failed to fetch the HTML content from https://www.python.org/downloads/"
        exit 1
    fi

    # Debug: Output the fetched HTML content (optional, can be commented out)
    # echo "$HTML_CONTENT"

    # Extract the latest stable Python version using grep, excluding pre-releases
    echo "$HTML_CONTENT" | grep -oP 'Python \K[0-9]+\.[0-9]+(?=\.[0-9]+(?![a-zA-Z]))' | sort -V | tail -1
}

# Get the latest stable Python version
LATEST_PYTHON_VERSION=$(get_latest_stable_python_version)

# Check if LATEST_PYTHON_VERSION is empty
if [ -z "$LATEST_PYTHON_VERSION" ]; then
    echo "Failed to determine the latest stable Python version."
    exit 1
fi

# Display the latest stable Python version to the user
echo "The latest stable Python version is: $LATEST_PYTHON_VERSION"

# Prompt the user to enter the Python version or use the latest
read -p "Enter the Python version to install (or press Enter to install the latest stable version $LATEST_PYTHON_VERSION): " PYTHON_VERSION

if [ -z "$PYTHON_VERSION" ]; then
    PYTHON_VERSION=$LATEST_PYTHON_VERSION
    echo "Installing the latest stable Python version: $PYTHON_VERSION"
else
    echo "Installing Python version: $PYTHON_VERSION"
fi

# Update package list and upgrade any outdated packages
sudo apt update
sudo apt upgrade -y

# Import the stable PPA for the specified Python version
sudo add-apt-repository ppa:deadsnakes/ppa -y

# Refresh the APT cache
sudo apt update

# Install the specified Python version
sudo apt install python$PYTHON_VERSION -y

# Confirm the installation
python$PYTHON_VERSION --version

echo "Python $PYTHON_VERSION installation is complete."

# Install the Python venv module for the specified version
sudo apt install python$PYTHON_VERSION-venv