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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 plot_and_save(self, data, w=800, h=420, filename='chart', overwrite=True):
 """Save the rendered html to a file and returns an IFrame to display the plot in the notebook."""

        self.save(data, filename, overwrite)
        return IFrame(filename + '.html', w, h)