code: def bytes_to_string(nbytes):
      if nbytes < 1024:
          return "%ib" % nbytes
  
      nbytes /= 1024.0
      if nbytes < 1024:
          return "%.1fkb" % nbytes
  
      nbytes /= 1024.0
      if nbytes < 1024:
          return "%.2fMb" % nbytes
  
      nbytes /= 1024.0
      return "%.1fGb" % nbytes
  
imports: import sys
  from io import BytesIO
  from urllib.request import urlopen
label_desc: Use image node_id 1 for calling a global function with example usage: bytes_to_string(nbytes) and returns: unknown, unknown, unknown, unknown