code: def token(self):
      try:
          while True:
              tok = next(self.parser)
              if tok.type not in self.ignore:
                  return tok
      except StopIteration:
          self.parser = None
          return None
  
imports: import sys
  import re
  import copy
  import time
  import os.path
label_desc: Use image node_id 18 for calling the Preprocessor obj's underlying member method code with example usage: obj.token() and returns: None, tok