chore: edit wrappers to have a separate flatten obs wrapper

stoix/configs/env/gymnax/asterix.yaml

@@ -10,3 +10,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/gymnax/breakout.yaml

@@ -10,3 +10,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/gymnax/cartpole.yaml

@@ -1,9 +1,9 @@
 # ---Environment Configs---
-env_name: gymnax
+env_name: gymnax # Used for logging purposes and selection of the corresponding wrapper.
 
 scenario:
   name: CartPole-v1
-  task_name: cartpole
+  task_name: cartpole # For logging purposes.
 
 kwargs: {}
 

stoix/configs/env/gymnax/freeway.yaml

@@ -10,3 +10,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/gymnax/space_invaders.yaml

@@ -10,3 +10,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jaxmarl/mabrax.yaml

@@ -1,19 +1,19 @@
 # ---Environment Configs---
 
 env_name: MaBrax  # Used for logging purposes and selection of the corresponding wrapper.
+
 scenario:
   name: ant_4x2   # [ant_4x2, halfcheetah_6x1, hopper_3x1, humanoid_9|8, walker2d_2x3]
   task_name: ant_4x2   # For logging purposes.
 
 
 add_agent_ids_to_state: False # Adds the agent IDs to the global state.
-flatten_observation: True # Flattens the observations.
 add_global_state : False # Adds the global state to the observations.
 
 kwargs:
   episode_length : 1000
   action_repeat: 1
-  auto_reset: False
+  auto_reset: False # needs to be set to false - we apply auto-reset wrapper on top of this
   backend: spring
   homogenisation_method: max # Default is None. Options: [max, concat] if dimensions of observations and actions are not homogeneous across agents,
   # "max" adds one-hot for the agent's ID. In this case, system.add_agent_id should be set to False.
@@ -22,3 +22,7 @@ kwargs:
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jaxmarl/mpe.yaml

@@ -6,7 +6,6 @@ scenario:
   task_name: mpe_simple
 
 add_agent_ids_to_state: False # Adds the agent IDs to the global state.
-flatten_observation: True # Flattens the observations.
 add_global_state : False # Adds the global state to the observations.
 
 kwargs:
@@ -15,3 +14,8 @@ kwargs:
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jaxmarl/smax.yaml

@@ -7,7 +7,6 @@ scenario:
   task_name: 2s3z
 
 add_agent_ids_to_state: False # Adds the agent IDs to the global state.
-flatten_observation: True # Flattens the observations.
 add_global_state : False # Adds the global state to the observations.
 
 kwargs:
@@ -18,3 +17,8 @@ kwargs:
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jumanji/2048.yaml

@@ -1,7 +1,6 @@
 # ---Environment Configs---
 env_name: jumanji
 observation_attribute : board
-flatten_observation: True
 multi_agent : False
 
 scenario:
@@ -13,3 +12,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jumanji/connector.yaml

@@ -1,7 +1,6 @@
 # ---Environment Configs---
 env_name: jumanji
 observation_attribute : grid
-flatten_observation: True
 multi_agent : True
 
 scenario:
@@ -17,3 +16,8 @@ kwargs:
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jumanji/rware.yaml

@@ -1,7 +1,6 @@
 # ---Environment Configs---
 env_name: jumanji
 observation_attribute : agents_view
-flatten_observation: True
 multi_agent : True
 
 scenario:
@@ -21,3 +20,7 @@ kwargs:
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jumanji/snake.yaml

@@ -1,18 +1,21 @@
 # ---Environment Configs---
 env_name: jumanji
 observation_attribute : grid
-flatten_observation: True
 multi_agent : False
 
 scenario:
   name: Snake-v1
   task_name: snake
 
-kwargs: {
-  num_rows: 6,
-  num_cols: 6,
-}
+kwargs:
+  num_rows: 6
+  num_cols: 6
+
 
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/jumanji/sokoban.yaml

@@ -1,7 +1,6 @@
 # ---Environment Configs---
 env_name: jumanji
 observation_attribute : grid
-flatten_observation: True
 multi_agent : False
 
 scenario:
@@ -13,3 +12,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+# wrapper:
+#   _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/minigrid/minigrid_doorkey_5x5.yaml

@@ -1,6 +1,5 @@
 # ---Environment Configs---
 env_name: minigrid
-flatten_observation: True
 scenario:
   name: MiniGrid-DoorKey-5x5
   task_name: minigrid_doorkey_5x5
@@ -10,3 +9,7 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/configs/env/minigrid/minigrid_empty_6x6.yaml

@@ -1,6 +1,5 @@
 # ---Environment Configs---
 env_name: minigrid
-flatten_observation: True
 scenario:
   name: MiniGrid-Empty-6x6
   task_name: minigrid_empty_6x6
@@ -10,3 +9,8 @@ kwargs: {}
 # Defines the metric that will be used to evaluate the performance of the agent.
 # This metric is returned at the end of an experiment and can be used for hyperparameter tuning.
 eval_metric: episode_return
+
+
+# Optional wrapper to flatten the observation space.
+wrapper:
+  _target_: stoix.wrappers.transforms.FlattenObservationWrapper

stoix/utils/make_env.py

@@ -24,8 +24,8 @@
 from stoix.wrappers import GymnaxWrapper, JumanjiWrapper, RecordEpisodeMetrics
 from stoix.wrappers.brax import BraxJumanjiWrapper
 from stoix.wrappers.jaxmarl import JaxMarlWrapper, MabraxWrapper, SmaxWrapper
-from stoix.wrappers.jumanji import MultiBoundedToBounded, MultiDiscreteToDiscrete
 from stoix.wrappers.pgx import PGXWrapper
+from stoix.wrappers.transforms import MultiBoundedToBounded, MultiDiscreteToDiscrete
 from stoix.wrappers.xminigrid import XMiniGridWrapper
 
 
@@ -54,11 +54,10 @@ def make_jumanji_env(
     env = jumanji.make(env_name, **env_kwargs)
     eval_env = jumanji.make(env_name, **env_kwargs)
     env, eval_env = JumanjiWrapper(
-        env, config.env.observation_attribute, config.env.flatten_observation
+        env, config.env.observation_attribute, config.env.multi_agent
     ), JumanjiWrapper(
         eval_env,
         config.env.observation_attribute,
-        config.env.flatten_observation,
         config.env.multi_agent,
     )
 
@@ -111,8 +110,8 @@ def make_xland_minigrid_env(env_name: str, config: DictConfig) -> Tuple[Environm
 
     eval_env, eval_env_params = xminigrid.make(env_name, **config.env.kwargs)
 
-    env = XMiniGridWrapper(env, env_params, config.env.flatten_observation)
-    eval_env = XMiniGridWrapper(eval_env, eval_env_params, config.env.flatten_observation)
+    env = XMiniGridWrapper(env, env_params)
+    eval_env = XMiniGridWrapper(eval_env, eval_env_params)
 
     env = AutoResetWrapper(env, next_obs_in_extras=True)
     env = RecordEpisodeMetrics(env)
@@ -170,13 +169,11 @@ def make_jaxmarl_env(
     # Create jaxmarl envs.
     env = _jaxmarl_wrappers.get(config.env.env_name, JaxMarlWrapper)(
         jaxmarl.make(env_name, **kwargs),
-        config.env.flatten_observation,
         config.env.add_global_state,
         config.env.add_agent_ids_to_state,
     )
     eval_env = _jaxmarl_wrappers.get(config.env.env_name, JaxMarlWrapper)(
         jaxmarl.make(env_name, **kwargs),
-        config.env.flatten_observation,
         config.env.add_global_state,
         config.env.add_agent_ids_to_state,
     )

stoix/wrappers/jaxmarl.py

@@ -156,7 +156,6 @@ class JaxMarlWrapper(Wrapper):
     def __init__(
         self,
         env: MultiAgentEnv,
-        flatten_observation: bool,
         has_global_state: bool,
         add_agent_ids_to_state: bool = False,
         timelimit: int = 1000,
@@ -166,7 +165,6 @@ def __init__(
 
         Args:
         - env: The JaxMarl environment to wrap.
-        - flatten_observation: Whether to flatten the observation.
         - has_global_state: Whether the environment has global state.
         - add_agent_ids_to_state: Whether to add the agent ids to the global state.
         - timelimit: The time limit for each episode.
@@ -180,7 +178,6 @@ def __init__(
 
         super().__init__(env)
         self._env: MultiAgentEnv
-        self._flatten_observation = flatten_observation
         self._timelimit = timelimit
         self.agents = self._env.agents
         self.num_agents = self._env.num_agents
@@ -231,8 +228,6 @@ def _create_observation(
         """Create an observation from the raw observation and environment state."""
 
         obs = batchify(obs, self.agents)
-        if self._flatten_observation:
-            obs = obs.reshape(-1)
 
         obs_data = {
             "agent_view": obs,
@@ -245,15 +240,14 @@ def _create_observation(
 
         if self.has_global_state:
             obs_data["global_state"] = self.get_global_state(wrapped_env_state, obs)
-            if self._flatten_observation:
-                obs_data["global_state"] = obs_data["global_state"].reshape(-1)
+
             return ObservationGlobalState(**obs_data)
         else:
             return Observation(**obs_data)
 
     def observation_spec(self) -> specs.Spec:
         agent_view = jaxmarl_space_to_jumanji_spec(
-            merge_space(self._env.observation_spaces, self._flatten_observation),
+            merge_space(self._env.observation_spaces),
         )
 
         action_mask = specs.BoundedArray(
@@ -265,8 +259,7 @@ def observation_spec(self) -> specs.Spec:
 
         if self.has_global_state:
             global_state_shape: Sequence[int] = (self.num_agents, self.state_size)
-            if self._flatten_observation:
-                global_state_shape = (self.num_agents * self.state_size,)
+
             global_state = specs.Array(
                 global_state_shape,
                 agent_view.dtype,
@@ -330,14 +323,11 @@ class SmaxWrapper(JaxMarlWrapper):
     def __init__(
         self,
         env: MultiAgentEnv,
-        flatten_observation: bool = True,
         has_global_state: bool = False,
         timelimit: int = 500,
         add_agent_ids_to_state: bool = False,
     ):
-        super().__init__(
-            env, flatten_observation, has_global_state, add_agent_ids_to_state, timelimit
-        )
+        super().__init__(env, has_global_state, add_agent_ids_to_state, timelimit)
         self._env: SMAX
 
     @cached_property
@@ -367,14 +357,11 @@ class MabraxWrapper(JaxMarlWrapper):
     def __init__(
         self,
         env: MABraxEnv,
-        flatten_observation: bool = True,
         has_global_state: bool = False,
         timelimit: int = 1000,
         add_agent_ids_to_state: bool = False,
     ):
-        super().__init__(
-            env, flatten_observation, has_global_state, add_agent_ids_to_state, timelimit
-        )
+        super().__init__(env, has_global_state, add_agent_ids_to_state, timelimit)
         self._env: MABraxEnv
 
     @cached_property