admin https://pytorch.org/tutorials/beginner/basics/intro.html https://www.youtube.com/watch?v=2S1dgHpqCdk&list=PLhhyoLH6IjfxeoooqP9rhU3HJIAVAJ3Vz&index=2
admin conda cheat sheet https://docs.conda.io/projects/conda/en/4.6.0/_downloads/52a95608c49671267e40c689e0bc00ca/conda-cheatsheet.pdf