On Thu, Feb 26, 2015 at 07:13:57AM -0500, Ken G. wrote: > Assuming I have the following list and code how do I best be able > rearrange the list as stated below: > > list = [0, 0, 21, 35, 19, 42]
Be aware that you have "shadowed" the built-in list function, which could cause trouble for you. py> list = [1, 2, 3] py> # much later, after you have forgotten you shadowed list... py> characters = list("Hello world") Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'list' object is not callable Oops. Save yourself future hassles, and pick a name like "L" (don't use "l", since that looks too similar to digit 1) or "mylist" or "seq" (short for sequence). > Using print list[2:6] resulted in the following: > > 2 21 > 3 35 > 4 19 > 5 42 I'm pretty sure it doesn't. py> lst = [0, 0, 21, 35, 19, 42] py> print(lst[2:6]) [21, 35, 19, 42] You're obviously doing a lot more than just `print lst[2:6]` to get the output you say you are getting. > I would like to rearrange the list as follow: > > 5 42 > 3 35 > 2 21 > 4 19 I don't understand how to generalise that. If you know you want that EXACT output, you can say: print "5 42" print "3 35" etc. to get it. Obviously that's not what you want, but I don't understand what rule you used to get "5 42" first, "3 35" second, etc. Where does the 5, 3, 2, 4 come from? What's the rule for getting 42 first, 19 last? > I tried using list.reverse() and print list[0,6] and it resulted in: > > [42, 19, 35, 21, 0, 0] or as printed: > > 0 42 > 1 19 > 2 35 > 3 21 > 4 0 > 5 0 > > In another words, I would desire to show that: > > 5 appears 42 times > 3 appears 35 times > 2 appears 21 times > 4 appears 19 times Huh? Now I'm *completely* confused. Your list was: [0, 0, 21, 35, 19, 42] 5, 3, 2 and 4 don't appear *at all*. You have: 0 appears twice 21 appears once 35 appears once 19 appears once 42 appears once > but then I lose my original index of the numbers by reversing. How do I > best keep the original index number to the rearrange numbers within a list? No clue what you mean. -- Steve _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor