code: def mem_total():
      return virtual_memory().total
  
imports: import logging
  import math
  import os
  import subprocess
  import sys
  import time
  from collections import namedtuple
  from typing import List, Optional
  import psutil
  from .lib import nvutils
  from ._resource import Resource, ZeroResource
  from .utils import get_bool_environ
label_desc: Use image node_id 4 for calling a global function with example usage: mem_total() and returns: virtual_memory