code: def set_seed(seed=None):
      if seed is not None:
          paddle.seed(seed)
          np.random.seed(seed)
          random.seed(seed)
  
imports: import os
  import contextlib
  import tempfile
  import random
  from urllib.parse import urlparse, unquote
  import yaml
  import numpy
  import paddle
  import cv2
  from paddleseg.utils import logger, seg_env, get_sys_env
  from paddleseg.utils.download import download_file_and_uncompress
label_desc: Use image node_id 1 for calling a global function with example usage: set_seed(seed) without return types