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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def clear(self):
 """Clear the displayed image."""

        self._imgobj = None
        try:
            # See if there is an image on the canvas
            self.canvas.delete_object_by_tag(self._canvas_img_tag)
            self.redraw()
        except KeyError:
            pass