code: def test_remember_last_method(self):
      call_count = defaultdict(int)
  
      class clz(object):
          @remember_last
          def func(self, x):
              call_count[(self, x)] += 1
              return x
  
      inst1 = clz()
      self.assertEqual(
          (inst1.func(1), call_count), (1, {(inst1, 1): 1})
      )
  
      # Calling again with the same argument should just re-use the old
      # value, which means func shouldn't get called again.
      self.assertEqual(
          (inst1.func(1), call_count), (1, {(inst1, 1): 1})
      )
  
      # Calling with a new value should increment the counter.
      self.assertEqual(
          (inst1.func(2), call_count),
          (2, {(inst1, 1): 1, (inst1, 2): 1}),
      )
      self.assertEqual(
          (inst1.func(2), call_count),
          (2, {(inst1, 1): 1, (inst1, 2): 1}),
      )
  
      # Calling the old value should still increment the counter.
      self.assertEqual(
          (inst1.func(1), call_count),
          (1, {(inst1, 1): 2, (inst1, 2): 1}),
      )
      self.assertEqual(
          (inst1.func(1), call_count),
          (1, {(inst1, 1): 2, (inst1, 2): 1}),
      )
  
      inst2 = clz()
      self.assertEqual(
          (inst2.func(1), call_count),
          (1, {(inst1, 1): 2, (inst1, 2): 1, (inst2, 1): 1}),
      )
      self.assertEqual(
          (inst2.func(1), call_count),
          (1, {(inst1, 1): 2, (inst1, 2): 1, (inst2, 1): 1}),
      )
  
      self.assertEqual(
          (inst2.func(2), call_count),
          (
              2,
              {
                  (inst1, 1): 2,
                  (inst1, 2): 1,
                  (inst2, 1): 1,
                  (inst2, 2): 1,
              },
          ),
      )
      self.assertEqual(
          (inst2.func(2), call_count),
          (
              2,
              {
                  (inst1, 1): 2,
                  (inst1, 2): 1,
                  (inst2, 1): 1,
                  (inst2, 2): 1,
              },
          ),
      )
  
      self.assertEqual(
          (inst2.func(1), call_count),
          (
              1,
              {
                  (inst1, 1): 2,
                  (inst1, 2): 1,
                  (inst2, 1): 2,
                  (inst2, 2): 1,
              },
          ),
      )
      self.assertEqual(
          (inst2.func(1), call_count),
          (
              1,
              {
                  (inst1, 1): 2,
                  (inst1, 2): 1,
                  (inst2, 1): 2,
                  (inst2, 2): 1,
              },
          ),
      )
  
      # Remove the above references to the instances and ensure that
      # remember_last has not made its own.
      del inst1, inst2
      call_count.clear()
      while gc.collect():
          pass
  
      self.assertFalse(
          [inst for inst in gc.get_objects() if type(inst) == clz]
      )
  
file_path: catalyst/tests/test_memoize.py
imports: from collections import defaultdict
  import gc
  from unittest import TestCase
  from catalyst.utils.memoize import remember_last
label_desc: Use image node_id 2 for calling the TestRememberLast obj's underlying member method code with example usage: obj.test_remember_last_method() and returns: x