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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 format(self):
 """ The |ChartFormat| object providing access to the shape formatting properties of this data point, such as line and fill. """

        dPt = self._ser.get_or_add_dPt_for_point(self._idx)
        return ChartFormat(dPt)