Paul Rubin wrote: > Steven D'Aprano <[EMAIL PROTECTED]> writes: >> Personally, I think the confusion of augmented assignments is not worth >> the benefit of saving typing a couple of characters. I think Guido's >> first decision, to leave += etc out of the language, was the right >> decision. > > It quite helpful to be able to say > > foo['bar'+lookup(baz)][blob(a)+frob(b)] += 1 > > without having to split it into separate statements to avoid repeating > the function calls and their possible side effects.
And that was the reason for eventually including them. I remember being very surprised when I learned that rebinding was possible at the option of the implementing object, but of course rebinding is inevitable when you have immutable objects that implement augmented assignments. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list