code: def brightness_aug(src, x):
      alpha = 1.0 + random.uniform(-x, x)
      src *= alpha
      return src
  
imports: from __future__ import print_function
  import numpy
  import cv2
  import os
  import math
  import sys
  import random
  from ..config import config
label_desc: Use image node_id 1 for calling a global function with example usage: brightness_aug(src, x) and returns: src