Add CI to run Python tests.

.github/workflows/python.yml

@@ -0,0 +1,45 @@
+# This workflow will generate a Python protobuf bindings and type stubs with Maven and run Python tests.
+
+name: Python CI with Maven and Pytest
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  workflow_dispatch:
+
+jobs:
+  run-python-ci:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Build with Maven
+        run: ./mvnw -B package -DskipTests # we run tests elsewhere
+
+      - name: Install Python bindings
+        run: |
+          cd python && python3 -m pip install .[test]
+      
+      - name: Run Python tests
+        run: |
+          pytest
+  

docs/python.rst

@@ -66,7 +66,7 @@ such as `bool`, `int`, `str`, or `float`, and the assignment will *NOT* work for
 >>> pf.type = spherocytosis
 Traceback (most recent call last):
   ...
-AttributeError: Assignment not allowed to field "type" in protocol message object.
+AttributeError: Assignment not allowed to composite field "type" in protocol message object.
 
 To set a message field, we must use the `CopyFrom` function: