On 6/25/2010 3:52 PM, Dave Angel wrote:
I said "default", not "only" behavior. I suspect list provides an __iadd__ method to provide this ability. Integers do not, and therefore neither does the object the OP was asking about.
I have no idea what "default behavior" is supposed to mean. Mutable objects like a list will generally modify in place. Immutable objects of course will not. An IntVar is mutable. You have given no reason for it not to handle ``+=`` in an unsurprising fashion. It is not an int. Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
