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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 get_data(self, data_x, data_y):
 """Get the data value at the given position. Indices are zero-based, as in Numpy. Parameters data_x, data_y : int Data indices for X and Y, respectively. Returns ------- value Data slice. Raises ------ ginga.ImageView.ImageViewNoDataError Image not found. """

        image = self.get_image()
        if image is not None:
            return image.get_data_xy(data_x, data_y)

        raise ImageViewNoDataError("No image found")