add pylint job for code checking

python-packages/base.yml

+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+  VIRTUALENV_NAME: "venv"
+
+cache:
+  paths:
+    - .cache/pip
+    - $VIRTUALENV_NAME/
+
+base:
+  stage: base
+  image: $ACR_URL/python:3.8
+  tags:
+    - docker
+  script:
+    - pip install virtualenv  # install virtualenv to create a virtual environment to install required packages
+    - virtualenv $VIRTUALENV_NAME  # create a virtualenvironment
+    - source $VIRTUALENV_NAME/bin/activate  # activate the virtualenvironment
+    - python -V  # print python version for debugging
\ No newline at end of file

python-packages/pylint.yml

+#defines the job in Static Analysis
+pylint:
+  stage: code_analysis
+  image: $ACR_URL/python:3.8
+  tags:
+    - docker
+  script:
+    - source $VIRTUALENV_NAME/bin/activate
+    - pip install pylint
+    - pylint -d C0301 $MODULE_FOLDER

python-packages/virtualenv.yml

-variables:
-  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
-  VIRTUALENV_NAME: "venv"
-
-cache:
-  paths:
-    - .cache/pip
-    - $VIRTUALENV_NAME/
-
 virtualenv:
-  stage: virtualenv
+  stage: dependencies
   image: $ACR_URL/python:3.8
   tags:
     - docker
-
+  only:
+    refs:
+    # run only when new tag is published or changes pushed to master
+    - tags
+    - master
   script:
-    - pip install virtualenv  # install virtualenv to create a virtual environment to install required packages
-    - virtualenv $VIRTUALENV_NAME  # create a virtualenvironment
-    - source $VIRTUALENV_NAME/bin/activate  # activate the virtualenvironment
-    - python -V  # print python version for debugging
     - pip install -r requirements.txt  --extra-index-url $ACR_PYPI_INDEX_URL # install required packages look also in artifactory