Make 'def' and 'class' usable within expressions

[Shane Hathaway]

On Fri, 26 Mar 2004, Ronald Oussoren wrote:

> 
> On 25-mrt-04, at 22:11, Shane Hathaway wrote:
> >
> > I just thought of a better way to write this.
> >
> >     myHandlers = {}
> >     myHandlers["click"] = def(x,y):
> >         print "click at x,y"
> >     myHandlers["enter"] = def():
> >         print "mouse entered"
> >     myHandlers["exit"] = def():
> >         print "mouse exited"
> >
> > I think that's pretty nice.
> 
> And how would you write in-line callbacks for functions that take 
> multiple callbacks (such as an on-success and on-error handler)?

I would write a class.

obj.add_listener(class):
    def on_success(self):
        print 'yay!'
    def on_error(self):
        print 'ohh.'

Shane