code: def checkActionDistribution(
      self, actions, epsilon, num_steps, log_probs
  ):
      # Check that the distribution of sampled actions is aligned with the epsilon
      # values.
      action_counts = np.bincount(
          np.hstack(actions), minlength=self._num_actions
      )
      greedy_prob = 1.0 - epsilon
      expected_counts = [
          (epsilon * num_steps) / self._num_actions
          for _ in range(self._num_actions)
      ]
      expected_counts[self._greedy_action] += greedy_prob * num_steps
      delta = num_steps * 0.1
      # Check that action_counts[i] \in [expected-delta, expected+delta]
      for i in range(self._num_actions):
          self.assertLessEqual(
              action_counts[i], expected_counts[i] + delta
          )
          self.assertGreaterEqual(
              action_counts[i], expected_counts[i] - delta
          )
  
      # Check that the log probs are correct.
      explore_prob = epsilon / self._num_actions
      for action, log_prob in zip(actions, log_probs):
          if not np.allclose([math.exp(log_prob)], [explore_prob]):
              # If it's not exploring, it must be taking the greedy action.
              self.assertEqual(self._greedy_action, action)
              self.assertAlmostEqual(math.exp(log_prob), greedy_prob)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import math
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tf_agents.policies import epsilon_greedy_policy
  from tf_agents.policies import fixed_policy
  from tf_agents.policies import utils
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.utils import common
  from tf_agents.utils import test_utils
label_desc: Use image node_id 2 for calling the EpsilonGreedyPolicyTest obj's underlying member method code with example usage: obj.checkActionDistribution(actions, epsilon, num_steps, log_probs) without return types