Hi! I’m trying to subscribe to things with KVO, and it seemingly works, but get this message after running the script more than once:
objc.error: Observer is overriding existing Objective-C class
import objc from Foundation import NSObject, NSKeyValueObservingOptionNew, NSKeyValueChangeNewKey font = Glyphs.font class Observer( NSObject ): def observeValueForKeyPath_ofObject_change_context_( self, path, object, changeDescription, context ): print( '"%s" has changed to "%s"' % (path, changeDescription[NSKeyValueChangeNewKey])) observer = Observer.new() font.addObserver_forKeyPath_options_context_( observer, 'familyName', NSKeyValueObservingOptionNew, 0 ) font.familyName = 'hello'
I assume the class should be removed in the end, but can’t seem to find how to do so? Or is this not a good way to subscribe to stuff altogether? Could you please give a piece of advice?