def get_lane(self):
        """
        Get the middle line of the street.
        """
        smooth_gray = add_gaussian_blur(self.image)
        yellow_line = select_yellow(smooth_gray)
        detect_edge = detect_edges(yellow_line, low_threshold=75, high_threshold=150)
        hough_line = hough_lines(detect_edge)

        return hough_line

        Get the middle line of the street.
        
apps/driving_pi/lane_detector.py