OP when i saw the title "list of simple mathematical operations in ECC secp256k1 (Python)." I think that those funtions will be implemented directly in python only... I don't see why you get merit just by showing someone else code here.
If you want some of these functions in pure Python, I've got some older code that does it:
https://gist.github.com/ymgve/efc307e173ed9ea8cb2cac3c7462ed7b