code: def number_to_string(num, units=None, precision=2):
      if units is None:
          if num // 10**9 > 0:
              return str(round(num / 10.0**9, precision)) + " G"
          elif num // 10**6 > 0:
              return str(round(num / 10.0**6, precision)) + " M"
          elif num // 10**3 > 0:
              return str(round(num / 10.0**3, precision)) + " K"
          else:
              return str(num) + " "
      else:
          if units == "G":
              return (
                  str(round(num / 10.0**9, precision)) + " " + units
              )
          elif units == "M":
              return (
                  str(round(num / 10.0**6, precision)) + " " + units
              )
          elif units == "K":
              return (
                  str(round(num / 10.0**3, precision)) + " " + units
              )
          else:
              return str(num) + " "
  
imports: import time
  import torch
  import torch.nn
  import torch.nn.functional
  from functools import partial
  from typing import List, Optional
  from collections import OrderedDict
  import numpy
label_desc: Use image node_id 38 for calling a global function with example usage: number_to_string(num, units, precision) and returns: unknown, unknown, unknown, unknown, unknown, unknown, unknown, unknown