On 8/9/06, Georg Brandl <[EMAIL PROTECTED]> wrote: > Terry Reedy wrote: > > "Neal Becker" <[EMAIL PROTECTED]> wrote in message > > news:[EMAIL PROTECTED] > >> class X (object): > >> pass > >> > >> X() += 2 > >> > >>> SyntaxError: can't assign to function call > >> > >> Suppose I actually had defined __iadd__ for class X. Python says this > >> syntax is invalid. I wish is wasn't. > > > > If you translate to x() = x() +2, with x called just once, it does not make > > sense. You can bind to names and slots in compound objects, but not to > > objects. > > This is similar to > > x = ([1], 2) > x[0] += [2] > > which doesn't currently work either, though it could.
No it couldn't. You can't assign to x[0]. L += R is defined as L = L.__iadd__(R) so L must be a valid assignment target. -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
