code: def setup_log_dir(opts):
      log_dir = "{}".format(date_filename(opts["log_dir"]))
      mkdir_p(log_dir)
      return log_dir
  
file_path: dgl/examples/pytorch/dgmg/utils.py
imports: import datetime
  import os
  import random
  from pprint import pprint
  import matplotlib.pyplot
  import torch
  import torch.backends.cudnn
  import torch.nn
  import torch.nn.init
label_desc: Use image node_id 3 for calling a global function with example usage: setup_log_dir(opts) and returns: log_dir