Adding new stage for the CI workflow: running pylint on code base (fmilthaler#101)

No changes to functionality, only adding pylint code quality checks to
the CI build. This closes fmilthaler#99

Author: fmilthaler

.github/workflows/pytest.yml

@@ -25,7 +25,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -35,4 +35,9 @@ jobs:
           python -m pip install .[test]
 
       - name: Run tests
-        run: make test
+        run: make test
+
+      - name: Analysing the code with pylint
+        if: ${{ matrix.python-version }} == '3.10'
+        run: |
+          pylint --fail-under=9 $(git ls-files '*.py')

requirements_dev.txt

@@ -1,5 +1,4 @@
 black==23.1.0
-pylint
 mypy
 isort
 jupyter

requirements_test.txt

@@ -1 +1,2 @@
-pytest>=7.3.2
+pytest>=7.3.2
+pylint