"It might make sense to be a tuple if you were doing a large grid, numbers and numbers of cells"
I don't understand this statement. Why would it make sense if you were doing a large grid? Wouldn't it also make sense for whatever length of the grid?
Steven Parker182,615 Points
You're right, that comment flys by without explanation. If Kenneth were still a teacher I'd tag him and ask what he meant by that.
As is, I will speculate that a tuple might offer efficiency advantages over a list that would become noticable when there were a very large number of items. But that's purely a guess.