Improve code readability for generic solver module

[GaboFGuerra]

Issue Number:

Objective of pull request:

Pull request checklist

Your PR fulfills the following requirements:

• [ ] Issue created that explains the change and why it's needed
• [ ] Tests are part of the PR (for bug fixes / features)
• [ ] Docs reviewed and added / updated if needed (for bug fixes / features)
• [ ] PR conforms to Coding Conventions
• [ ] PR applys BSD 3-clause or LGPL2.1+ Licenses to all code files
• [ ] Lint (pyb) passes locally
• [ ] Build tests (pyb -E unit) or (python -m unittest) passes locally

Pull request type

Please check your PR type:

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation changes
• [ ] Other (please describe):

What is the current behavior?

What is the new behavior?

Does this introduce a breaking change?

• [ ] Yes
• [ ] No

Supplemental information