logistichazard and coxph basics

Hi Havard.
I wanted to use Logistichazard that is based on Nnet_survival. I couldnt find the architecture of this net. In which file I can understand the architecture?
In addition I wanted to ask you what is the difference between cox-ph in your repository and cox-ph in lifelines library of python. First I wanted to use lifelines python package but because I didn't see any codes for images as input I tried to use your amazing repository.

The issue names Logistichazard, Nnet_survival, and lifelines but no file or test. Start by locating the Logistichazard and Nnet_survival definitions, then compare the repository's cox-ph implementation with lifelines. Done would be a documented architecture pointer and a clear comparison, but the issue does not define a target file or acceptance criteria.

Written by the indexing model from the issue text.