Try with a custom action

github_actions/pylint/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.7-alpine
+
+RUN apk add --no-cache bash build-base gcc
+RUN pip install --upgrade pip
+RUN pip install pylint
+RUN python --version ; pip --version ; pylint --version
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]