Formatting

test/base/test_env_finite.py

@@ -250,7 +250,7 @@ def test_finite_dummy_vector_env() -> None:
         envs.tracker = MetricTracker()
         try:
             # TODO: why on earth 10**18?
-            test_collector.collect(n_step=10 ** 18)
+            test_collector.collect(n_step=10**18)
         except StopIteration:
             envs.tracker.validate()
 
@@ -265,6 +265,6 @@ def test_finite_subproc_vector_env() -> None:
     for _ in range(3):
         envs.tracker = MetricTracker()
         try:
-            test_collector.collect(n_step=10 ** 18)
+            test_collector.collect(n_step=10**18)
         except StopIteration:
             envs.tracker.validate()

tianshou/data/collector.py

@@ -27,7 +27,7 @@ from tianshou.data.types import (
 from tianshou.env import BaseVectorEnv, DummyVectorEnv
 from tianshou.policy import BasePolicy
 from tianshou.utils.print import DataclassPPrintMixin
-from tianshou.utils.torch_utils import in_eval_mode, in_train_mode
+from tianshou.utils.torch_utils import in_eval_mode
 
 log = logging.getLogger(__name__)
 
@@ -260,8 +260,16 @@ class BaseCollector(ABC):
     ) -> CollectStats:
         pass
 
-    def collect(self, n_step: int | None = None, n_episode: int | None = None, random: bool = False, render: float | None = None,
-            no_grad: bool = True, reset_before_collect: bool = False, gym_reset_kwargs: dict[str, Any] | None = None) -> CollectStats:
+    def collect(
+        self,
+        n_step: int | None = None,
+        n_episode: int | None = None,
+        random: bool = False,
+        render: float | None = None,
+        no_grad: bool = True,
+        reset_before_collect: bool = False,
+        gym_reset_kwargs: dict[str, Any] | None = None,
+    ) -> CollectStats:
         """Collect a specified number of steps or episodes.
 
         To ensure an unbiased sampling result with the n_episode option, this function will

tianshou/highlevel/agent.py

@@ -130,7 +130,10 @@ class AgentFactory(ABC, ToStringMixin):
             log.info(
                 f"Collecting {self.sampling_config.start_timesteps} initial environment steps before training (random={self.sampling_config.start_timesteps_random})",
             )
-            train_collector.collect(n_step=self.sampling_config.start_timesteps, random=self.sampling_config.start_timesteps_random)
+            train_collector.collect(
+                n_step=self.sampling_config.start_timesteps,
+                random=self.sampling_config.start_timesteps_random,
+            )
         return train_collector, test_collector
 
     def set_policy_wrapper_factory(

tianshou/policy/modelfree/discrete_sac.py

@@ -107,7 +107,11 @@ class DiscreteSACPolicy(SACPolicy[TDiscreteSACTrainingStats]):
     ) -> Batch:
         logits_BA, hidden_BH = self.actor(batch.obs, state=state, info=batch.info)
         dist = Categorical(logits=logits_BA)
-        act_B = dist.mode if self.deterministic_eval and not self.is_within_training_step else dist.sample()
+        act_B = (
+            dist.mode
+            if self.deterministic_eval and not self.is_within_training_step
+            else dist.sample()
+        )
         return Batch(logits=logits_BA, act=act_B, state=hidden_BH, dist=dist)
 
     def _target_q(self, buffer: ReplayBuffer, indices: np.ndarray) -> torch.Tensor:

tianshou/policy/modelfree/pg.py

@@ -197,7 +197,11 @@ class PGPolicy(BasePolicy[TPGTrainingStats], Generic[TPGTrainingStats]):
         # the action_dist_input_BD in that case is a tuple of loc_B, scale_B and needs to be unpacked
         dist = self.dist_fn(action_dist_input_BD)
 
-        act_B = dist.mode if self.deterministic_eval and not self.is_within_training_step else dist.sample()
+        act_B = (
+            dist.mode
+            if self.deterministic_eval and not self.is_within_training_step
+            else dist.sample()
+        )
         # act is of dimension BA in continuous case and of dimension B in discrete
         result = Batch(logits=action_dist_input_BD, act=act_B, state=hidden_BH, dist=dist)
         return cast(DistBatchProtocol, result)

tianshou/trainer/base.py

@@ -5,7 +5,6 @@ from collections import defaultdict, deque
 from collections.abc import Callable
 from contextlib import contextmanager
 from dataclasses import asdict
-from typing import Optional, Tuple
 
 import numpy as np
 import tqdm
@@ -305,7 +304,6 @@ class BaseTrainer(ABC):
         with progress(total=self.step_per_epoch, desc=f"Epoch #{self.epoch}", **tqdm_config) as t:
             train_stat: CollectStatsBase
             while t.n < t.total and not self.stop_fn_flag:
-
                 train_stat, update_stat, self.stop_fn_flag = self.training_step()
 
                 if isinstance(train_stat, CollectStats):
@@ -417,9 +415,8 @@ class BaseTrainer(ABC):
         finally:
             self.policy.is_within_training_step = old_value
 
-    def training_step(self) -> Tuple[CollectStatsBase, Optional[TrainingStats], bool]:
+    def training_step(self) -> tuple[CollectStatsBase, TrainingStats | None, bool]:
         with self._is_within_training_step_enabled(True):
-
             should_stop_training = False
 
             if self.train_collector is not None:
@@ -438,7 +435,7 @@ class BaseTrainer(ABC):
             return collect_stats, training_stats, should_stop_training
 
     def _collect_training_data(self) -> CollectStats:
-        """Performs training data collection
+        """Performs training data collection.
 
         :return: the data collection stats
         """
@@ -446,7 +443,10 @@ class BaseTrainer(ABC):
         assert self.train_collector is not None
         if self.train_fn:
             self.train_fn(self.epoch, self.env_step)
-        collect_stats = self.train_collector.collect(n_step=self.step_per_collect, n_episode=self.episode_per_collect)
+        collect_stats = self.train_collector.collect(
+            n_step=self.step_per_collect,
+            n_episode=self.episode_per_collect,
+        )
 
         self.env_step += collect_stats.n_collected_steps
 
@@ -465,8 +465,7 @@ class BaseTrainer(ABC):
         return collect_stats
 
     def _test_in_train(self, collect_stats: CollectStats) -> bool:
-        """
-        If test_in_train and stop_fn are set, will compute the stop_fn on the mean return of the training data.
+        """If test_in_train and stop_fn are set, will compute the stop_fn on the mean return of the training data.
         Then, if the stop_fn is True there, will collect test data also compute the stop_fn of the mean return
         on it.
         Finally, if the latter is also True, will set should_stop_training to True.