On 2/2/2012 9:17 AM, John O'Hagan wrote:
It's not so much about the type of x but that of x[1]. Wouldn't it be possible to omit the assignment simply if the object referred to by x[1] uses "+=" without creating a new object? That way, some_tuple[i] += y will succeed if some_tuple[i] is a list but not with, say, an int. That seems reasonable to me.
There was considerable discussion of the exact semantics of augmented operations when they were introduced. I do not remember if that particular idea was suggested (and rejected) or not. You could try to look at the PEP, if there is one, or the dicussion ( probably on pydev list).
-- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
