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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 most_free_pixel(self):
 """ Find the black pixel with the largest distance from the white pixels. Returns ------- :obj:`numpy.ndarray` 2-vector containing the most free pixel """

        dist_tf = self.to_distance_im()
        max_px = np.where(dist_tf == np.max(dist_tf))
        free_pixel = np.array([max_px[0][0], max_px[1][0]])
        return free_pixel