Refactor third script and move inside package

[pmayd]

I guess this is not really related to the PR so maybe we should address it separately, but generally I would suggest to move functionality into the package itself and keep the script shorter, similar to how script 1 and 2 changed. This would also make statements about test coverage inside the package more meaningful wrt. to the overall project. So the situation that tests pass, coverage is good, and scripts still fail is less likely.

Ursprünglich gepostet von @KonradUdoHannes in #121 (comment)