I recently started a course about machine-learning as a part of my master that is apparently essentially a course in PyTorch, since starting the course i have learned that PyTorch is actually used a lot in industry and thus this course have become more important to me...

However, apparently my professor has made a bunch of libraries (deeplay, deeptrack) to use with pytorch that he wants us to use, but my question is, how is PyTorch used in industry? Should i learn raw PyTorch or get more comfortable using other libraries that use PyTorch?