[Pyobjc-dev] PyObjC equivalent of ObjC's categories?

[Jacob Kaplan-M. <ja...@ja...>]

Hey all --

For me, one of the most powerful tools that ObjC gives is the ability 
to create "categories" on existing classes.  This allows extending 
existing classes without actually needing to subclass them.  For 
example (taken from Apple's AnimatedSlider sample code):

@interface NSSlider (SliderAnimation)

- (IBAction) animateToFloatValueFrom: sender;
- (void) animateToFloatValue:(float) newValue;

@end

The above adds two instance methods to the NSSlider used in the application.

How would I go about doing the same thing in PyObjC?  Obviously I 
could subclass NSSlider to add the new methods, but I guess I'm 
looking for something that's a closer functional match to what the 
ObjC code does.

TIA,

Jacob