code: def translate_y_rel(img, pct, **kwargs):
      pixels = pct * img.size[1]
      _check_args_tf(kwargs)
      return img.transform(
          img.size, Image.AFFINE, (1, 0, 0, 0, 1, pixels), **kwargs
      )
  
imports: import math
  import random
  import re
  import numpy
  import PIL
  from classy_vision.dataset.transforms import register_transform
  from classy_vision.dataset.transforms.classy_transform import ClassyTransform
  from PIL import Image, ImageEnhance, ImageOps
label_desc: Use image node_id 6 for calling a global function with example usage: translate_y_rel(img, pct) and returns: img