Greg> Guido: >> I think the slice notation e.g. x[1:4] kills that idea. Greg> Maybe if ":" were a sliceobject-creating operator usable anwyere, Greg> not just in [...], and you added arithmetic methods to Greg> sliceobjects so you could use them as rationals... Does x[1:4] return a slice out of x or x[rational(1,4)]? Skip