class_docstr: Monitor and autorestart a kernel.
class_docstr_tok: ["Monitor","and","autorestart","a","kernel","."]
docstr: Start the polling of the kernel.
docstr_tok: ["Start","the","polling","of","the","kernel","."]
code: def start(self) -> None:
      """Start the polling of the kernel."""
      if self._pcallback is None:
          from tornado.ioloop import PeriodicCallback
  
          self._pcallback = PeriodicCallback(
              self.poll,
              1000 * self.time_to_dead,
          )
          self._pcallback.start()
  
file_path: catboost/contrib/python/jupyter-client/py3/jupyter_client/ioloop/restarter.py
imports: import time
  import warnings
  from typing import Any
  from traitlets import Instance
  from ..restarter import KernelRestarter
label_desc: Use image node_id 2 for calling the IOLoopKernelRestarter obj's underlying member method code with example usage: obj.start() without return types