diff --git a/predicators/envs/spot_env.py b/predicators/envs/spot_env.py
index 98c431bb22..19c9b7fa50 100644
--- a/predicators/envs/spot_env.py
+++ b/predicators/envs/spot_env.py
@@ -7,7 +7,7 @@
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Callable, ClassVar, Collection, Dict, Iterator, List, \
-    Optional, Sequence, Set, Tuple, Any
+    Optional, Sequence, Set, Tuple
 
 import PIL.Image
 import matplotlib
@@ -22,6 +22,7 @@
 
 from predicators import utils
 from predicators.envs import BaseEnv
+from predicators.pretrained_model_interface import OpenAIVLM
 from predicators.settings import CFG
 from predicators.spot_utils.perception.object_detection import \
     AprilTagObjectDetectionID, KnownStaticObjectDetectionID, \
@@ -49,7 +50,6 @@
 from predicators.structs import Action, EnvironmentTask, GoalDescription, \
     GroundAtom, LiftedAtom, Object, Observation, Predicate, \
     SpotActionExtraInfo, State, STRIPSOperator, Type, Variable
-from predicators.pretrained_model_interface import OpenAIVLM
 
 ###############################################################################
 #                                Base Class                                   #
@@ -96,12 +96,7 @@ class _PartialPerceptionState(State):
     in the classifier definitions for the dummy predicates
     """
 
-    # # DEBUG Add an additional field to store Spot images
-    # # This would be directly copied from the images in raw Observation
-    # # NOTE: This is only used when using VLM for predicate evaluation
-    # # NOTE: Performance aspect should be considered later
-    # cam_images: Optional[Dict[str, RGBDImageWithContext]] = None
-    # # TODO: it's still unclear how we select and store useful images!
+    # obs_images: Optional[Dict[str, RGBDImageWithContext]] = None
 
     @property
     def _simulator_state_predicates(self) -> Set[Predicate]:
@@ -1071,11 +1066,11 @@ def _generate_goal_description(self) -> GoalDescription:
 
 def vlm_predicate_classify(question: str, state: State) -> bool:
     """Use VLM to evaluate (classify) a predicate in a given state."""
-    full_prompt = vlm_predicate_eval_prompt_prefix.format(
-        question=question
-    )
+    full_prompt = vlm_predicate_eval_prompt_prefix.format(question=question)
     images_dict: Dict[str, RGBDImageWithContext] = state.camera_images
-    images = [PIL.Image.fromarray(v.rotated_rgb) for _, v in images_dict.items()]
+    images = [
+        PIL.Image.fromarray(v.rotated_rgb) for _, v in images_dict.items()
+    ]
 
     logging.info(f"VLM predicate evaluation for: {question}")
     logging.info(f"Prompt: {full_prompt}")
@@ -1095,7 +1090,8 @@ def vlm_predicate_classify(question: str, state: State) -> bool:
     elif vlm_response == "no":
         return False
     else:
-        logging.error(f"VLM response not understood: {vlm_response}. Treat as False.")
+        logging.error(
+            f"VLM response not understood: {vlm_response}. Treat as False.")
         return False
 
 
@@ -1197,7 +1193,8 @@ def _on_classifier(state: State, objects: Sequence[Object]) -> bool:
 
     else:
         # Check that the bottom of the object is close to the top of the surface.
-        expect = state.get(obj_surface, "z") + state.get(obj_surface, "height") / 2
+        expect = state.get(obj_surface,
+                           "z") + state.get(obj_surface, "height") / 2
         actual = state.get(obj_on, "z") - state.get(obj_on, "height") / 2
         classification_val = abs(actual - expect) < _ONTOP_Z_THRESHOLD
 
@@ -1575,7 +1572,8 @@ def _get_sweeping_surface_for_container(container: Object,
 # is VLM perceptible or not.
 # NOTE: candidates: on, inside, door opened, blocking, not blocked, ...
 _VLM_EVAL_PREDICATES: {
-    _On, _Inside,
+    _On,
+    _Inside,
 }