code: def get_file_size(filename):
      """
      Given a file, get the size of file in MB
      """
      size_in_mb = os.path.getsize(filename) / float(1024**2)
      return size_in_mb
  
imports: import json
  import logging
  import os
  import pickle
  import re
  import shutil
  import time
  from urllib.parse import urlparse
  import numpy
  import pandas
  import yaml
  from iopath.common.download import download
  from iopath.common.file_io import file_lock, g_pathmgr
  from vissl.utils.slurm import get_slurm_dir
label_desc: Use image node_id 9 for calling a global function with example usage: get_file_size(filename) and returns: size_in_mb