code: def _tokenize_signature(s):
      lines = s.encode("ascii").splitlines()
      generator = iter(lines).__next__
      return tokenize.tokenize(generator)
  
imports: from contextlib import contextmanager
  from enum import EnumMeta
  import inspect
  import tokenize
  from ..compat import _get_module
  from ..utils.logger import logger
  from ..utils.command import Command, capture_stdout, default_bin
label_desc: Use image node_id 1 for calling a global function with example usage: _tokenize_signature(s) and returns: tokenize