Python • Re: compile python from source with tkinter support

Code:

#!/usr/bin/env bash#------------------------------------------------------------------------------# setup_python_venv_tkinter.sh## Purpose:#   - Ensure Python 3 is present#   - Ensure "venv" support is present (Debian package: python3-venv)#   - Ensure tkinter support is present (Debian package: python3-tk)#   - Create a virtual environment and install basic Python tooling packages## Target OS:#   - Raspberry Pi OS (Debian-based, uses apt)## Usage:#   chmod +x setup_python_venv_tkinter.sh#   ./setup_python_venv_tkinter.sh## Optional:#   VENV_DIR can be overridden:#     VENV_DIR=~/myenv ./setup_python_venv_tkinter.sh#------------------------------------------------------------------------------set -euo pipefail#---------------------------## 0) Simple helper methods  ##---------------------------#log()  { echo -e "\n[INFO] $*"; }warn() { echo -e "\n[WARN] $*" >&2; }die()  { echo -e "\n[ERROR] $*" >&2; exit 1; }#---------------------------## 1) Sanity checks          ##---------------------------## Make sure we're on a system with apt-get (Raspberry Pi OS / Debian / Ubuntu).command -v apt-get >/dev/null 2>&1 || die "This script expects apt-get (Debian/Raspberry Pi OS)."# Make sure python3 exists (apt package name is usually 'python3').if ! command -v python3 >/dev/null 2>&1; then  log "python3 not found. Installing python3..."  sudo apt-get update  sudo apt-get install -y python3else  log "python3 found: $(python3 --version)"fi#---------------------------## 2) Ensure OS packages     ##---------------------------## On Raspberry Pi OS, the following packages matter:#   - python3-venv : provides the 'venv' module (python3 -m venv ...)#   - python3-pip  : provides pip for Python 3#   - python3-tk   : provides tkinter support (Tk bindings)## Why install via apt (not pip)?#   - venv and tkinter are tied to system Python packaging on Debian systems.#   - pip is for Python packages, while Tk libraries and bindings are OS-level.REQUIRED_APT_PACKAGES=(  python3-venv  python3-pip  python3-tk)log "Installing required OS packages (idempotent: safe to re-run)..."sudo apt-get updatesudo apt-get install -y "${REQUIRED_APT_PACKAGES[@]}"# Optional but commonly helpful for building some pip packages with native extensions:# Uncomment if you want a smoother experience compiling wheels on the Pi.# sudo apt-get install -y build-essential python3-dev#---------------------------## 3) Verify venv works      ##---------------------------## If python3-venv isn't installed, this command often fails with:#   "The virtual environment was not created successfully because ensurepip is not available..."log "Verifying that 'python3 -m venv' is functional..."python3 -m venv --help >/dev/null 2>&1 || die "'python3 -m venv' is not working. Is python3-venv installed?"#---------------------------## 4) Create the virtual env ##---------------------------## Default venv location is a local folder called ".venv".# You can override it with:#   VENV_DIR=~/myenv ./setup_python_venv_tkinter.shVENV_DIR="${VENV_DIR:-./.venv}"log "Creating/refreshing virtual environment at: ${VENV_DIR}"# This creates the venv if it doesn't exist. If it exists, it won't destroy it;# it will just leave it in place. If you want to start fresh, delete the folder:#   rm -rf .venvpython3 -m venv "${VENV_DIR}"#---------------------------## 5) Activate venv          ##---------------------------## Activating modifies PATH so "python" and "pip" point into the venv.# shellcheck disable=SC1090source "${VENV_DIR}/bin/activate"log "Venv activated. Using python: $(command -v python)"log "Venv python version: $(python --version)"#---------------------------## 6) Update pip toolchain   ##---------------------------## pip/setuptools/wheel are the basics for installing packages cleanly.log "Upgrading pip, setuptools, wheel inside the venv..."python -m pip install --upgrade pip setuptools wheel#---------------------------## 7) Install 'basic modules'##---------------------------## "Basic modules" is subjective. Here are safe, common, and lightweight picks.# Edit this list to match your project needs.BASIC_PIP_PACKAGES=(  requests  rich)log "Installing basic pip packages inside the venv: ${BASIC_PIP_PACKAGES[*]}"python -m pip install "${BASIC_PIP_PACKAGES[@]}"#---------------------------## 8) Verify tkinter import  ##---------------------------## tkinter is NOT installed by pip; it comes from the OS package python3-tk.# A venv typically uses the system's standard library, so if python3-tk is installed,# importing tkinter from inside the venv should work.log "Verifying tkinter import from inside the venv..."python - <<'PY'import sysprint("Python executable:", sys.executable)try:    import tkinter as tk    print("tkinter import: OK")    print("Tk version:", tk.TkVersion)except Exception as e:    print("tkinter import: FAILED")    print("Error:", e)    raisePY#---------------------------## 9) Finish / reminders     ##---------------------------#log "All done."cat <<'EOF'Next steps:  1) Activate the venv in your shell:       source .venv/bin/activate  2) Run Python and try tkinter:       python -c "import tkinter; print('tkinter OK')"  3) When you're finished, deactivate:       deactivateTip:  If you ever want a fresh environment:    rm -rf .venv    ./setup_python_venv_tkinter.shEOF