More style fixes

[talavis]

Describe the pull request:

• [ ] Bug fix
• [ ] Functional change
• [ ] New feature
• [X] Code cleanup
• [ ] Build system change
• [ ] Documentation change
• [ ] Language translation

Pull request long description:

Style changes based on pylint and flake, as well as some personal preferences.

Pylintrc is changed to reactivate multiple unused test.