How the event list be sent to EventManager?

steve hxianping at gmail.com
Fri Oct 27 10:52:59 EDT 2006


Can an argument to reference an object's attribute??

Fredrik Lundh wrote:
> steve wrote:
>
> > The example code from: http://sjbrown.ezide.com/games/example1.py.html
> > ...
> > def Notify( self, event ):
> >                 if not isinstance(event, TickEvent): Debug( "
> > Message: " + event.name )
> >                 for listener in self.listeners.keys():
> >                         #If the weakref has died, remove it and
> > continue
> >                         #through the list
> >                         if listener is None:
> >                                 del self.listeners[ listener ]
> >                                 continue
> >                         listener.Notify( event )
> >
> > I can not figure out how 'event' can has reference to 'event.name'?
>
> because the developer expects you to pass in an object that has a name
> attribute ?  (one of the Event types defined at the top of that module,
> most likely).
>
> > Anyhow the 'event' has not defined!
>
> it's an argument to the method.
>
> > The 'event' dynamically get its own type through
> > isinstance(event,TickEvent):...?
>
> no, that line simply checks if it's a specific Event type, and enables
> debug logging for all other event types.
> 
> </F>




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