code: def test_close(self):
      open_file = open(__file__, "rb")
      self.addCleanup(open_file.close)
      fd = open_file.fileno()
      kqueue = select.kqueue()
  
      # test fileno() method and closed attribute
      self.assertIsInstance(kqueue.fileno(), int)
      self.assertFalse(kqueue.closed)
  
      # test close()
      kqueue.close()
      self.assertTrue(kqueue.closed)
      self.assertRaises(ValueError, kqueue.fileno)
  
      # close() can be called more than once
      kqueue.close()
  
      # operations must fail with ValueError("I/O operation on closed ...")
      self.assertRaises(ValueError, kqueue.control, None, 4)
  
file_path: cpython/Lib/test/test_kqueue.py
imports: import errno
  import os
  import select
  import socket
  from test import support
  import time
  import unittest
label_desc: Use image node_id 6 for calling the TestKQueue obj's underlying member method code with example usage: obj.test_close() without return types