Integration issue with PyObjC and TKinter
Question: The following simple code:

    
    
    from PyObjCTools import AppHelper
    import AppKit
    import Tkinter
    
    class App(AppKit.NSApplication):
    
        def finishLaunching(self):
            self.root=Tkinter.Tk()
    
    _=App.sharedApplication()
    AppHelper.runEventLoop()
    

yields the following exception: `Python[23717:d07] -[App _setup:]:
unrecognized selector sent to instance 0x105d05340`

What am I doing wrong?


Answer: I don't think you can mix Tkinter and Cocoa toolkits so interchangeably.
`self.root` is an attribute on the class `App`, which inherits from
`AppKit.NSApplication`. My guess is that the `Tk()` call returns a pointer
that is then passed to the Cocoa frameworks, but points to a Tk data structure
that it can't understand. Also, both Tkinter and PyObjC need their own
eventloop; I'm not sure if you can even mix the two (though I've never tried).

My recommendation would be to use one UI toolkit or the other, but not both.

