style: fix ruff linting

Author: juelg

python/rcs/envs/creators.py

@@ -137,8 +137,10 @@ def __call__(  # type: ignore
         cameras: dict[str, SimCameraConfig] | None = None,
         hand_cfg: rcs.sim.SimTilburgHandConfig | None = None,
         gripper_cfg: rcs.sim.SimGripperConfig | None = None,
-        random_pos_args: dict = {}
+        random_pos_args: dict | None = None,
     ) -> gym.Env:
+        if random_pos_args is None:
+            random_pos_args = {}
         mode = "gripper"
         if gripper_cfg is None and hand_cfg is None:
             _gripper_cfg = default_sim_gripper_cfg()
@@ -192,8 +194,10 @@ def __call__(  # type: ignore
         resolution: tuple[int, int] | None = None,
         frame_rate: int = 0,
         delta_actions: bool = True,
-        cam_list: list[str] = ["wrist", "bird_eye", "side", "right_side", "left_side", "front"],
+        cam_list: list[str] | None = None,
     ) -> gym.Env:
+        if cam_list is None:
+            cam_list = [],
         if resolution is None:
             resolution = (256, 256)
         cameras = {
@@ -219,9 +223,11 @@ def __call__(  # type: ignore
         resolution: tuple[int, int] | None = None,
         frame_rate: int = 0,
         delta_actions: bool = True,
-        cam_list: list[str] = [],
+        cam_list: list[str] | None = None,
         mjcf_path: str = "",
     ) -> gym.Env:
+        if cam_list is None:
+            cam_list = []
         if resolution is None:
             resolution = (256, 256)
         if cam_list is None or len(cam_list) == 0:

python/rcs/envs/sim.py

@@ -309,7 +309,7 @@ def __init__(
     def reset(
         self, seed: int | None = None, options: dict[str, Any] | None = None
     ) -> tuple[dict[str, Any], dict[str, Any]]:
-        if options is not None and "RandomObjectPos.init_object_pose" in options.keys():
+        if options is not None and "RandomObjectPos.init_object_pose" in options:
             assert isinstance(
                 options["RandomObjectPos.init_object_pose"], rcs.common.Pose
             ), "RandomObjectPos.init_object_pose must be a rcs.common.Pose"