Do you want to Train Large scale semantic NLP Models in your Delphi GUI App? This post will get to understand how to use Gensim Python Library. Topic modeling python for Delphi (P4D) is a set of free components that wrap up the Python DLL into Delphi. They let you easily execute Python scripts, create new Python modules and new Python types. You can use Python4Delphi a number of different ways.