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]

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]