On Tue, Sep 7, 2010 at 1:49 PM, Roel Schroeven <rschroev_nospam...@fastmail.fm> wrote: > > But remember that you can make it simpler if you simply don't specify > the start and end points: > >>>> 'hello'[::-1] > 'olleh' >
While I know that idiom works, I haven't really found an explanation as to *why* it works that way. For a string S: * Using range, you need range(len(S),-1,-1) to give you the indexes for the string in reverse. * For slices, if you dont specify the start and end indices, they are supposed to be filled in by 0 and len(S) respectively. - So S[::-1] means, S[0:len(S):-1] , so why dont we start with index 0 here, and then go to -1 (last char) and then into an infinite loop? - Especially, when S[0:len(S):1] works that way? - Sandip _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
