Use Ruff to check python syntax

.editorconfig

@@ -8,6 +8,8 @@ insert_final_newline = true
 charset = utf-8
 indent_style = space
 indent_size = 4
+# Default ruff value
+max_line_length = 88
 
 [*.{css,scss,js,jsx,ts,vue,json,yml}]
 charset = utf-8

.github/workflows/python_lint.yml

@@ -0,0 +1,27 @@
+name: Check python syntax
+
+on:
+  push:
+
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.11"]
+    steps:
+    - name: Checkout repository
+      uses: actions/[email protected]
+
+    - name: Set Python Version
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python_version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements-dev.txt
+
+    - name: Python Ruff Lint and Format
+      run: ruff check

CONTRIBUTING.md

@@ -15,6 +15,24 @@ This project relies on a few frameworks / libraries including:
 For the following steps, we assume you use PoWA web in debug mode (for example
 by running `./run-powa.py` or using podman dev environment).
 
+### Python syntax
+
+Python syntax must conform to ruff. CI checks new code with ruff.
+
+If not already available, you can create a virtualenv for developpement purpose:
+
+```shell
+python3 -m venv .venv
+source .venv/bin/activate
+pip install -r requirements-dev.txt
+```
+
+You can then do a syntax check by running the following command:
+
+``` shell
+ruff check
+```
+
 ## Requirements
 
  - A recent version of `NodeJS` (16+) and `npm` are required.

requirements-dev.txt

@@ -0,0 +1,2 @@
+-r requirements.txt
+ruff --only-binary=ruff