code: def b2mb(num):
      """convert Bs to MBs and round down"""
      return int(num / 2**20)
  
file_path: ipyexperiments/ipyexperiments/utils/mem.py
imports: import gc
  import os
  from collections import namedtuple
  from ipyexperiments.utils.pynvml_gate import load_pynvml_env
label_desc: Use image node_id 3 for calling a global function with example usage: b2mb(num) and returns: int