code: def connect(self, port):
      from socket import socket, AF_INET, AF_INET6, SOCK_STREAM
  
      family, host = AF_INET, "127.0.0.1"
      if os.environ.get("SPARK_PREFER_IPV6", "false").lower() == "true":
          family, host = AF_INET6, "::1"
      sock = socket(family, SOCK_STREAM)
      sock.connect((host, port))
      # send a split index of -1 to shutdown the worker
      sock.send(b"\xFF\xFF\xFF\xFF")
      sock.close()
      return True
  
file_path: spark/python/pyspark/tests/test_daemon.py
imports: import os
  import sys
  import time
  import unittest
  from pyspark.serializers import read_int
label_desc: Use image node_id 1 for calling the DaemonTests obj's underlying member method code with example usage: obj.connect(port) and returns: True