code: def flip(img):
      # print 'flip'
      new_img = img.transpose(Image.FLIP_LEFT_RIGHT)
      return new_img
  
imports: from __future__ import division
  from builtins import range
  from builtins import object
  import random
  import numpy
  from PIL import Image, ImageEnhance
  import math
label_desc: Use image node_id 9 for calling a global function with example usage: flip(img) and returns: new_img