code: def test_state_dict(self):
      a = 0
      b = {1: 2, 3: [4]}
      test_hook = TestHook(a, b)
      state_dict = test_hook.get_classy_state()
      # create a new test_hook and set its state to the old hook's.
      test_hook = TestHook("", 0)
      test_hook.set_classy_state(state_dict)
      self.assertEqual(test_hook.state.a, a)
      self.assertEqual(test_hook.state.b, b)
  
      # make sure we're able to load old checkpoints
      b_new = {1: 2}
      c_new = "hello"
      test_hook_new = TestHookNew(b_new, c_new)
      test_hook_new.set_classy_state(state_dict)
      self.assertEqual(test_hook_new.state.a, a)
      self.assertEqual(test_hook_new.state.b, b)
      self.assertEqual(test_hook_new.state.c, c_new)
  
file_path: ClassyVision/test/hooks_classy_hook_test.py
imports: import copy
  import unittest
  from classy_vision.hooks import build_hook, build_hooks, ClassyHook, register_hook
label_desc: Use image node_id 2 for calling the TestClassyHook obj's underlying member method code with example usage: obj.test_state_dict() without return types