code: def _is_notebook(path):
      return os.path.isfile(path) and path.lower().endswith(".ipynb")
  
imports: import ast
  import json
  import logging
  import os
  import re
  from guild import config
  from guild import guildfile
  from guild import model
  from guild import plugin
  from guild import python_util
  from guild import util
  from .None import flags_import_util
label_desc: Use image node_id 1 for calling a global function with example usage: _is_notebook(path) and returns: unknown