Hi, I am aware this is a bit trollish, but I am a little bit sick off doing black box testing of the python api

bpy.data.meshes.from_pydata() is not documented sufficiently, it's really hard to find out how this very complicated process of adding geometry works and all it's details.

vertices/faces.foreach_set("", ...) is also rather undocumented, I couldn't mange to add geometry with this method either, so I did in the past. The api has somehow changed, but it's hard to figure out how.

unpack_face_list() is broken/obsolete?