A quick but ugly [brain-dead ]fix would be sorting keys seperately,

From: James Hartley <jjhartley <at> gmail.com>
Subject: [Tutor] sorting dictionary keys?
To: tutor <at> python.org
Date: Tuesday, May 13, 2008, 11:06 AM

I suspect this is a brain-dead question... Given the following code, output is as expected: $ cat test.py d = { 'a' : 1, 'd' : 2, 'b' : 3, 'c' : 0 } for i in d.keys(): print "%s\t%s" % (i, d[i]) $ python test.py a 1 c 0 b 3 d 2 $ But if the keys are sorted, I get an error: $ cat test1.py d = { 'a' : 1, 'd' : 2, 'b' : 3, 'c' : 0 } for i in d.keys().sort(): print "%s\t%s" % (i, d[i]) $ python test1.py Traceback (most recent call last): File "test.py", line 3, in <module> for i in d.keys().sort(): TypeError: 'NoneType' object is not iterable $ What is the correct manner to iterate through sorted dictionary keys? Thanks. Jim _______________________________________________ Tutor maillist - Tutor <at> python.org http://mail.python.org/mailman/listinfo/tutor