merge AgentInterface.emulate_act_on_trainer and AgentInterface.act

rl_coach/agents/agent.py

@@ -783,10 +783,11 @@ class Agent(AgentInterface):
 
         return batches_dict
 
-    def act(self) -> ActionInfo:
+    def act(self, action: Union[None, ActionType]=None) -> ActionInfo:
         """
         Given the agents current knowledge, decide on the next action to apply to the environment
 
+        :param action: An action to take, overriding whatever the current policy is
         :return: An ActionInfo object, which contains the action and any additional info from the action decision process
         """
         if self.phase == RunPhase.TRAIN and self.ap.algorithm.num_consecutive_playing_steps.num_steps == 0:
@@ -799,9 +800,10 @@ class Agent(AgentInterface):
         self.current_episode_steps_counter += 1
 
         # decide on the action
+        if action is None:
             if self.phase == RunPhase.HEATUP and not self.ap.algorithm.heatup_using_network_decisions:
                 # random action
-            self.last_action_info = self.spaces.action.sample_with_info()
+                action = self.spaces.action.sample_with_info()
             else:
                 # informed action
                 if self.pre_network_filter is not None:
@@ -811,7 +813,10 @@ class Agent(AgentInterface):
 
                 else:
                     curr_state = self.curr_state
-            self.last_action_info = self.choose_action(curr_state)
+                action = self.choose_action(curr_state)
+                assert isinstance(action, ActionInfo)
+
+        self.last_action_info = action
 
         # is it intentional that self.last_action_info is not filtered?
         filtered_action_info = self.output_filter.filter(self.last_action_info)
@@ -1036,29 +1041,6 @@ class Agent(AgentInterface):
 
         return transition.game_over
 
-    # TODO-remove - this is a temporary flow, used by the trainer worker, duplicated from observe() - need to create
-    #         an external trainer flow reusing the existing flow and methods [e.g. observe(), step(), act()]
-    def emulate_act_on_trainer(self, action: ActionType) -> ActionInfo:
-        """
-        This emulates the act using the transition obtained from the rollout worker on the training worker
-        in case of distributed training.
-        Given the agents current knowledge, decide on the next action to apply to the environment
-        :return: an action and a dictionary containing any additional info from the action decision process
-        """
-        if self.phase == RunPhase.TRAIN and self.ap.algorithm.num_consecutive_playing_steps.num_steps == 0:
-            # This agent never plays  while training (e.g. behavioral cloning)
-            return None
-
-        # count steps (only when training or if we are in the evaluation worker)
-        if self.phase != RunPhase.TEST or self.ap.task_parameters.evaluate_only:
-            self.total_steps_counter += 1
-        self.current_episode_steps_counter += 1
-
-        # these types don't match: ActionInfo = ActionType
-        self.last_action_info = action
-
-        return self.last_action_info
-
     def get_success_rate(self) -> float:
         return self.num_successes_across_evaluation_episodes / self.num_evaluation_episodes_completed
 

rl_coach/agents/agent_interface.py

@@ -142,16 +142,6 @@ class AgentInterface(object):
         """
         raise NotImplementedError("")
 
-    # TODO-remove - this is a temporary flow, used by the trainer worker, duplicated from observe() - need to create
-    #         an external trainer flow reusing the existing flow and methods [e.g. observe(), step(), act()]
-    def emulate_act_on_trainer(self, action: ActionType) -> ActionInfo:
-        """
-        This emulates the act using the transition obtained from the rollout worker on the training worker
-        in case of distributed training.
-        :return: A tuple containing the actual action
-        """
-        raise NotImplementedError("")
-
     def collect_savers(self, parent_path_suffix: str) -> SaverCollection:
         """
         Collect all of agent savers

rl_coach/level_manager.py

@@ -313,7 +313,7 @@ class LevelManager(EnvironmentInterface):
         # for i in range(self.steps_limit.num_steps):
         # let the agent observe the result and decide if it wants to terminate the episode
         done = acting_agent.emulate_observe_on_trainer(transition)
-        acting_agent.emulate_act_on_trainer(transition.action)
+        acting_agent.act(transition.action)
 
         if done:
             self.handle_episode_ended()