> On 27 March 2013 10:59, <rahulredd...@hotmail.com> wrote: >> >> So i have a set of for loops that create this : >> [snip] >> but i want to nest all the loops under one BIG loop that'll run in reverse >> to make this: [snip] >> Is this possible?
On 27 March 2013 00:19, Xavier Ho <cont...@xavierho.com> wrote: > There is a built-in function that reverses an iterable. Have a look at the > documentation. I assume you mean the reversed function. It does not in general reverse an iterable. From the docs: """ reversed(seq) Return a reverse iterator. seq must be an object which has a __reversed__() method or supports the sequence protocol (the __len__() method and the __getitem__() method with integer arguments starting at 0). New in version 2.4. Changed in version 2.6: Added the possibility to write a custom __reversed__() method. """ So it reverses a sequence (having the __len__ and __getitem__ methods) or an object that advertises reversibility (having a __reversed__ method). It does not reverse anything else including generators, iterators and most non-sequence iterables. To the OP: To reverse a "set of for loops" as requested is not possible using the reversed function. It is, however, possible to reverse a list of strings. So if you have a function that returns the list of strings you show as output then you can easily reverse that list with reversed(mylist) or mylist[::-1]. Oscar -- http://mail.python.org/mailman/listinfo/python-list
