code: def test_copy(self):
      s = SampleBatch(
          {
              "a": np.array([1, 2, 3, 2, 3, 4]),
              "b": {"c": np.array([4, 5, 6, 5, 6, 7])},
              SampleBatch.SEQ_LENS: [2, 3, 1],
              "state_in_0": [1.0, 3.0, 4.0],
          }
      )
      s_copy = s.copy(shallow=False)
      s_copy["a"][0] = 100
      s_copy["b"]["c"][0] = 200
      s_copy[SampleBatch.SEQ_LENS][0] = 3
      s_copy[SampleBatch.SEQ_LENS][1] = 2
      s_copy["state_in_0"][0] = 400.0
      self.assertNotEqual(s["a"][0], s_copy["a"][0])
      self.assertNotEqual(s["b"]["c"][0], s_copy["b"]["c"][0])
      self.assertNotEqual(
          s[SampleBatch.SEQ_LENS][0], s_copy[SampleBatch.SEQ_LENS][0]
      )
      self.assertNotEqual(
          s[SampleBatch.SEQ_LENS][1], s_copy[SampleBatch.SEQ_LENS][1]
      )
      self.assertNotEqual(s["state_in_0"][0], s_copy["state_in_0"][0])
  
      s_copy = s.copy(shallow=True)
      s_copy["a"][0] = 100
      s_copy["b"]["c"][0] = 200
      s_copy[SampleBatch.SEQ_LENS][0] = 3
      s_copy[SampleBatch.SEQ_LENS][1] = 2
      s_copy["state_in_0"][0] = 400.0
      self.assertEqual(s["a"][0], s_copy["a"][0])
      self.assertEqual(s["b"]["c"][0], s_copy["b"]["c"][0])
      self.assertEqual(
          s[SampleBatch.SEQ_LENS][0], s_copy[SampleBatch.SEQ_LENS][0]
      )
      self.assertEqual(
          s[SampleBatch.SEQ_LENS][1], s_copy[SampleBatch.SEQ_LENS][1]
      )
      self.assertEqual(s["state_in_0"][0], s_copy["state_in_0"][0])
  
imports: import copy
  import functools
  import os
  import unittest
  import numpy
  import torch
  import tree
  import ray
  from ray.rllib.models.repeated_values import RepeatedValues
  from ray.rllib.policy.sample_batch import SampleBatch, attempt_count_timesteps, concat_samples
  from ray.rllib.utils.compression import is_compressed
  from ray.rllib.utils.framework import try_import_torch
  from ray.rllib.utils.test_utils import check
  from ray.rllib.utils.torch_utils import convert_to_torch_tensor
label_desc: Use image node_id 12 for calling the TestSampleBatch obj's underlying member method code with example usage: obj.test_copy() without return types