Pylint fails almost all the time

[Lukasz825700516]

Reason

Automatic linter tests on the new pull requests should work only on files that are subject to given language linter.

Objective

• [ ] run linting on every new commit in pull request
• [ ] run linting only if the python file has changed
• [ ] fix pylint failing if no python files has changed

Requires

None

[Lukasz825700516]

Naprawić pylinta w CI