Remove warnings (#111)

- Replace `use_pretrained_backbone` with `pretrained_backbone_weights`
- Bump diffusers' minimum version `0.26.3` -> `0.27.2`
- Add ignore flags in CI's pytest
- Change Box observation spaces in simulation environments
- Set `version_base="1.2"` in Hydra initializations
- Bump einops' minimum version `0.7.0` -> `0.8.0`

lerobot/common/utils/io_utils.py

@@ -0,0 +1,12 @@
+import warnings
+
+import imageio
+
+
+def write_video(video_path, stacked_frames, fps):
+    # Filter out DeprecationWarnings raised from pkg_resources
+    with warnings.catch_warnings():
+        warnings.filterwarnings(
+            "ignore", "pkg_resources is deprecated as an API", category=DeprecationWarning
+        )
+        imageio.mimsave(video_path, stacked_frames, fps=fps)

lerobot/common/utils/utils.py

@@ -92,7 +92,8 @@ def init_hydra_config(config_path: str, overrides: list[str] | None = None) -> D
     hydra.core.global_hydra.GlobalHydra.instance().clear()
     # Hydra needs a path relative to this file.
     hydra.initialize(
-        str(_relative_path_between(Path(config_path).absolute().parent, Path(__file__).absolute().parent))
+        str(_relative_path_between(Path(config_path).absolute().parent, Path(__file__).absolute().parent)),
+        version_base="1.2",
     )
     cfg = hydra.compose(Path(config_path).stem, overrides)
     return cfg