slicing a list but in downward fashion

[Lee Sander]

hi,
i have a list and i can get elements form it via slicing
L[start:stop]
but sometimes the start is stop i.e. I want to go in the opposite
direction,eg
L[10:2],

mattab lets you do L(10:-1:2) to achive this, is there a way to do
this in python?
thanks
L

[Mensanator]

Re: slicing a list but in downward fashion

On Mar 19, 6:37 pm, Lee Sander <lesa...@gmail. comwrote:

hi,
i have a list and i can get elements form it via slicing
L[start:stop]
but sometimes the start is stop i.e. I want to go in the opposite
direction,eg
L[10:2],
>
mattab lets you do L(10:-1:2) to achive this, is there a way to do
this in python?

>>a = [1,2,3,4,5,6,7,8 ,9,10,11,12,13, 14,15]
>>a[3:10:2]

[4, 6, 8, 10]

>>a[10:3:-2]

[11, 9, 7, 5]

thanks
L