Message 84151 - Python tracker

Well, this already happen with other types:

>>> a   = 100
>>> a //= 2.0
>>> a
50.0

>>> d  = datetime.datetime.now()
>>> d -= datetime.datetime.now()
>>> d
datetime.timedelta(-1, 86391, 609000)

See http://docs.python.org/reference/datamodel.html#object.__iadd__
"... return the result (which could be, but does not have to be, self) ..."