question

Hi.

Why

class AbstractWrapper:

    def noWidget(self):
        """
        Returns true if this wrapper's widget has not yet been
        created by the backend (i.e. it doesn't exist, or is
        a DummyWidget).
        """
        try:
            try:
                widget = self.widget
            except AttributeError:
                return 1
            assert(widget.isDummy())
            return 1
        except (AttributeError,AssertionError):
            return 0

vs.

    def noWidget(self):
       try:
         return isinstance(self.widget,DummyWidget)
       except AttributeError:
         return 1

or even

    def noWidget(self):
         return isinstance(self.widget,DummyWidget)





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