Python package GitHub Action.

.github/workflows/python-package.yml

@@ -0,0 +1,43 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Python package
+
+on:
+  push:
+    branches: [ "py3k" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        python-version: ["3.9", "3.11", "3.13"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[test]
+    - name: Lint checks (Ruff)
+      run: |
+        ruff check --output-format=github --diff
+    - name: Import sort checks (isort)
+      run: |
+        isort --check --diff .
+    - name: Formatting checks (Black)
+      run: |
+        black --check --diff .
+    - name: Typing checks (mypy)
+      run: |
+        mypy .