Fix Docker build: add --system to uv pip uninstall opencv-python

Dockerfile

@@ -19,7 +19,7 @@ RUN cd ${CODE_DIR}/stable-baselines3 && \
     uv pip install --system torch --default-index ${PYTORCH_DEPS} && \
     uv pip install --system -e .[extra,tests,docs] && \
     # Use headless version for docker
-    uv pip uninstall opencv-python && \
+    uv pip uninstall --system opencv-python && \
     uv pip install --system opencv-python-headless && \
     pip cache purge && \
     uv cache clean

docs/misc/changelog.md

@@ -25,6 +25,7 @@
 - Fixed mypy error in test_vec_envs.py by wrapping `itertools.product` with `list()`
 - Improved tests coverage for RMSpropTFLike optimizer (invalid params, centered/momentum/weight_decay branches, pickle roundtrip)
 - Improved test coverage for `save_util.py`: added tests for `BadZipFile` error handling in `load_from_zip_file` and `IsADirectoryError`/`FileNotFoundError` handling in `open_path`
+- Fixed Docker build by adding the missing `--system` flag to `uv pip uninstall opencv-python` (required by recent `uv`)
 
 ### Documentation:
 

stable_baselines3/common/envs/__init__.py

@@ -16,5 +16,4 @@
     "IdentityEnvMultiBinary",
     "IdentityEnvMultiDiscrete",
     "SimpleMultiObsEnv",
-    "SimpleMultiObsEnv",
 ]

stable_baselines3/common/vec_env/base_vec_env.py

@@ -289,7 +289,7 @@ def render(self, mode: str | None = None) -> np.ndarray | None:
             self.env_method("render")
         return None
 
-    def seed(self, seed: int | None = None) -> Sequence[None | int]:
+    def seed(self, seed: int | None = None) -> Sequence[int | None]:
         """
         Sets the random seeds for all environments, based on a given seed.
         Each individual environment will still get its own seed, by incrementing the given seed.
@@ -392,7 +392,7 @@ def reset(self) -> VecEnvObs:
     def step_wait(self) -> VecEnvStepReturn:
         pass
 
-    def seed(self, seed: int | None = None) -> Sequence[None | int]:
+    def seed(self, seed: int | None = None) -> Sequence[int | None]:
         return self.venv.seed(seed)
 
     def set_options(self, options: list[dict] | dict | None = None) -> None:

stable_baselines3/ppo/ppo.py

@@ -88,7 +88,7 @@ def __init__(
         gamma: float = 0.99,
         gae_lambda: float = 0.95,
         clip_range: float | Schedule = 0.2,
-        clip_range_vf: None | float | Schedule = None,
+        clip_range_vf: float | Schedule | None = None,
         normalize_advantage: bool = True,
         ent_coef: float = 0.0,
         vf_coef: float = 0.5,