class_docstr: Manages a TensorFlow estimator for training.
class_docstr_tok: ["Manages","a","TensorFlow","estimator","for","training","."]
docstr: Finds a free port on the current node.
docstr_tok: ["Finds","a","free","port","on","the","current","node","."]
code: def find_free_port(self):
      """Finds a free port on the current node."""
      return find_free_port()
  
file_path: BigDL/python/orca/src/bigdl/orca/learn/tf/tf_runner.py
imports: from contextlib import closing
  import json
  import logging
  import os
  import socket
  import ray
  from bigdl.dllib.utils.log4Error import invalidInputError
  from typing import TYPE_CHECKING, Any
label_desc: Use image node_id 8 for calling the TFRunner obj's underlying member method code with example usage: obj.find_free_port() and returns: find_free_port