You have to read up on the slicing operator in the Python Manual.

Generally you can slice a sequence with [start: end: step]
By default start=0, end=len(seq), step=1
step=-1 goes from the end to the beginning of the sequence, hence your reverse.

For some nice slicing examples see post #4 at;
http://www.daniweb.com/forums/post10...tml#post104865

wow ^^ even i didn't know that

I have used slice notation in the past. I wasn't aware that there was the 'step'. Thanks for your reply and link to the post.