Embedding JupyterLite in a Windows Application

OK, I have to realize that there is no interest in answering this kind of question, since I have asked this in various Python forums in the last many years. So, I have to assume that the is a good reason for that, and one obvious reason is that I’m going in a wrong direction. Even it seems obvious for me to embed Python/JupyterLite into my application it is probably not the preferred way of exchanging data between a Windows application and Python. So I will therefore ask this question in a new thread:
How would a real Python user like to exchange data with a Windows application?