[Tutor] slicing a string

Alan Gauld alan.gauld at btinternet.com
Tue Sep 7 00:43:29 CEST 2010


"lists" <lists at justuber.com> wrote

> Assuming that mytext is "test", I've found that mytext[-1:-4:-1]
> doesn't work (as I expected it to) but that mytext[::-1] does.
>
> While that's fine, I just wondered why mytext[-1:-4:-1] doesn't 
> work?

It does work.
But remember that slices give you the first item to one less
than the second index, so for a 4 letter word you need an
index of of -5...

>>> "test"[-1:-4:-1]
'tse'
>>> "test"[-1:-5:-1]
'tset'
>>>

HTH,

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/




More information about the Tutor mailing list