class_docstr: Class for communicating between a Frontend and a Kernel
class_docstr_tok: ["Class","for","communicating","between","a","Frontend","and","a","Kernel"]
code: def _default_kernel(self):
      if Kernel.initialized():
          return Kernel.instance()
      return None
  
file_path: catboost/contrib/python/ipykernel/py3/ipykernel/comm/comm.py
imports: import uuid
  from typing import Optional
  from warnings import warn
  import comm.base_comm
  import traitlets.config
  from traitlets import Bool, Bytes, Instance, Unicode, default
  from ipykernel.jsonutil import json_clean
  from ipykernel.kernelbase import Kernel
label_desc: Use image node_id 1 for calling the Comm obj's underlying member method code with example usage: obj._default_kernel() and returns: None, Kernel