On 2/5/11, Siim Märtmaa <foob...@gmail.com> wrote: > 2011/2/5 Alex Hall <mehg...@gmail.com>: >> Yes, I get the same thing. However, when you try to index, as in a[0], >> you have problems. Here are two lines from my program: >> for i in res: print i >> This works as expected, printing every object in res.results, just as I >> wanted. >> >> for i in range(len(res)): print str(i+1)+": "+str(res[i]) >> This gives me an error, on this line, that "TypeError: 'SearchResults' >> object does not support indexing". So it seems that I can iterate over >> the list, but not get at a given element. What builtin method do I >> need to overload to do this? > > It is the __getitem__ method Thanks, that did it. > > Strange that when I ran code that I wrote to look like yours, I got a > different error: > > AttributeError: itertest instance has no attribute '__getitem__' > > My code: > #### > class itertest(): > > testlist = [1,2,32,4,5,6,7,8] > > def __iter__(self): > return iter(self.testlist) > > def __len__(self): > return len(self.testlist) > > def __getitem__(self, i): > return self.testlist[i] > > > tester = itertest() > > for i in range(len(tester)): print str(i+1)+": "+str(tester[i]) > > #### Not sure. Is it because you did not declare it as an object class: class myClass(object): ... > > I think in this case it would be more readable to use enumerate > instead of range(len(sequence)) > > for index, item in enumerate(tester): print str(index+1)+": "+str(item) Very true, I always forget about that handy function. > > or in some cases string substitution > > for index, item in enumerate(tester): print "%d: %s"%(index+1,item) Also true, and something I really should do more. I have heard it is faster than concatenating anyway. >
-- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
