code: def get_color(idx):
      idx = idx * 3
      color = ((37 * idx) % 255, (17 * idx) % 255, (29 * idx) % 255)
      return color
  
imports: from __future__ import division
  import os
  import cv2
  import math
  import numpy
  import PIL
  from PIL import Image, ImageDraw, ImageFile
label_desc: Use image node_id 7 for calling a global function with example usage: get_color(idx) and returns: color