code: def get_proportion(self, lines):
      proportion = 0.0
      h, w = self.shape
      for line in lines:
          x1, y1, x2, y2 = line
          length = abs(y2 - y1) / h + abs(x2 - x1) / w
          proportion = proportion + length
  
      return proportion
  
imports: import argparse
  import codecs
  import os
  import yaml
  import numpy
  import cv2
  from sklearn.cluster import DBSCAN
  from pptracking.python.det_infer import load_predictor
label_desc: Use image node_id 8 for calling the LaneSegPredictor obj's underlying member method code with example usage: obj.get_proportion(lines) and returns: proportion