docstr: Tests extracting data starting at step 1k.
docstr_tok: ["Tests","extracting","data","starting","at","step","1k","."]
code: def test_extract_value_1m_only_start_at_1k(self):
      """Tests extracting data starting at step 1k."""
      values, walltime = utils.extract_event_log_values(
          os.path.join(
              TEST_DATA, "event_log_3m/events.out.tfevents.1599310762"
          ),
          "AverageReturn",
          1000000,
          start_step=10000,
      )
      # Verifies only 1M records were examined 0-1M = 101.
      self.assertLen(values, 100)
      # Wall time is less than if counting started at step 0.
      self.assertAlmostEqual(walltime, 366.92087, places=4)
  
file_path: agents/tf_agents/benchmark/utils_test.py
imports: import os
  import tensorflow
  from tf_agents.benchmark import utils
  from tf_agents.utils import test_utils
label_desc: Use image node_id 3 for calling the UtilsTest obj's underlying member method code with example usage: obj.test_extract_value_1m_only_start_at_1k() without return types