Plz explain the difference btwn set operations: remove, delete, update

Answer 1

If you mean Set methods, update(t) will update your set with elements from t, and remove(t) will remove t from set. AFAIK, there's no delete() method. Everything can be found on docs.python.org :)

Answer 2

ubdate are used to replace by a new valu
remove used to delete a value