code: def parse_file_size(file_size):
      file_size = file_size.lower().strip()
      if len(file_size) == 0:
          return 0
      n = int(keep_only_digits(file_size))
      if file_size[-1] == "b":
          file_size = file_size[:-1]
      e = file_size[-1]
      return SIZE_PREFIX_LOOKUP[e] * n if e in SIZE_PREFIX_LOOKUP else n
  
imports: import os
  import sys
  import time
  import heapq
  import semver
  import random
  from multiprocessing import Pool
  from collections import namedtuple
label_desc: Use image node_id 1 for calling a global function with example usage: parse_file_size(file_size) and returns: unknown, int