code: def valid_ident(s):
      m = IDENTIFIER.match(s)
      if not m:
          raise ValueError("Not a valid Python identifier: %r" % s)
      return True
  
imports: import cStringIO
  import errno
  import io
  import logging
  import logging.handlers
  import os
  import re
  import socket
  import struct
  import sys
  import traceback
  import types
  from SocketServer import ThreadingTCPServer, StreamRequestHandler
label_desc: Use image node_id 8 for calling a global function with example usage: valid_ident(s) and returns: True