publish to PyPI #4

	# GitHub Actions workflow to build and upload a Python package to PyPI via Twine
	name: publish to PyPI

	# Trigger the workflow when a GitHub release is published
	on:
	release:
	types:
	- published

	permissions:
	contents: read # Read‑only access is enough for checking out the code

	jobs:
	deploy:
	runs-on: ubuntu-latest # Use the latest Ubuntu runner provided by GitHub
	steps:
	# 1. Check out the repository code
	- name: Checkout repository
	uses: actions/checkout@v4

	# 2. Set up a Python 3.10 environment
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.10'

	# 3. Upgrade pip and install the "build" backend required for PEP 517/518 builds
	- name: Install build dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install build

	# 4. Build the source distribution (sdist) and wheel into the "dist/" folder
	- name: Build package
	run: python -m build

	# 5. Publish the package to PyPI using the API token stored in the repository secrets
	- name: Publish package to PyPI
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	user: __token__ # Standard username for token‑based uploads
	password: ${{ secrets.PYPI_API_TOKEN }} # API token scoped to the PyPI project

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