code: def test_get(self):
      d = self._empty_mapping()
      self.assertTrue(d.get(next(iter(self.other.keys()))) is None)
      self.assertEqual(d.get(next(iter(self.other.keys())), 3), 3)
      d = self.reference
      self.assertTrue(d.get(next(iter(self.other.keys()))) is None)
      self.assertEqual(d.get(next(iter(self.other.keys())), 3), 3)
      self.assertEqual(
          d.get(next(iter(self.inmapping.keys()))),
          next(iter(self.inmapping.values())),
      )
      self.assertEqual(
          d.get(next(iter(self.inmapping.keys())), 3),
          next(iter(self.inmapping.values())),
      )
      self.assertRaises(TypeError, d.get)
      self.assertRaises(TypeError, d.get, None, None, None)
  
imports: import copy
  import gc
  import random
  import threading
  import unittest
  import torch
  from torch.testing._internal.common_utils import find_library_location, IS_FBCODE, IS_MACOS, IS_SANDCASTLE, IS_WINDOWS, run_tests, TestCase
  from torch.utils.weak import _WeakHashRef, WeakIdKeyDictionary
label_desc: Use image node_id 15 for calling the WeakKeyDictionaryTestCase obj's underlying member method code with example usage: obj.test_get() without return types