Model Points from files and display

I have a couple, probably, stupid questions, but I was wondering how you import a typical model file programmatically in python into 3D Slicer, how to access/display the point cloud and wire mesh from the model for display, and finally how to programmatically get a list or sequence of the points from a point cloud or model?

This might of relevance to some of your questions:
https://slicer.readthedocs.io/en/latest/developer_guide/script_repository.html#show-comparison-view-of-all-model-files-a-folder