range syntax

[Colin J. Williams]

One of the little irritants of Python is that the range syntax is rather 
long-winded:
[Dbg]>>> range(3, 20, 6)
[3, 9, 15]
[Dbg]>>>
It would be nice if one could have something like 3:20:6.

I've just come across the r_class in numpy which doesn't go that far
but does provide a generalization of the above:
[Dbg]>>> r_[1:6:2, 6:8, (10, 11, 13), [20,25]]
array([ 1,  3,  5,  6,  7, 10, 11, 13, 20, 25])
[Dbg]>>>

Colin W.