With patch applied to 3.5, tk.Canvas().keys() works and test_tk and other three files pass with -ugui.Is avoiding splitlist calls when not needed worthwhile?  Tests also pass with     def keys(self):        """Return a list of all resource names of this widget."""        config = self.tk.call(self._w, 'configure')        if type(config) == tuple:            return [x[0][1:] for x in config]        else:  # str            splitlist = self.tk.splitlist            return [splitlist(x)[0][1:] for x in                splitlist(config)]I am a bit curious why Canvas gives a different return.  Is the special casing in _tkinter or tk itself?  Otherwise, looks good to me.