Fix quadruped tutorial noise import

[ooctipus]

Summary

• Update the quadruped base tutorial to import UniformNoiseCfg, which is the current noise config API used elsewhere in the repo.
• Preserve behavior: UniformNoiseCfg defaults to additive noise, matching the tutorial usage.

Validation

• python3 -m py_compile scripts/tutorials/03_envs/create_quadruped_base_env.py
• pre-commit run --files scripts/tutorials/03_envs/create_quadruped_base_env.py
• python3 tools/changelog/cli.py check develop

Full Kit launch was not run locally; this environment does not have the prepared Isaac Lab runtime dependencies installed.

[greptile-apps]

Greptile Summary

This PR fixes a broken import in the quadruped base tutorial by replacing the no-longer-exported AdditiveUniformNoiseCfg alias with UniformNoiseCfg, which is the current public API in isaaclab.utils.noise. Runtime behavior is preserved because UniformNoiseCfg inherits operation="add" from NoiseCfg by default.

• Replaces from isaaclab.utils.noise import AdditiveUniformNoiseCfg as Unoise with from isaaclab.utils.noise import UniformNoiseCfg as Unoise — the old symbol no longer exists in the module, so this change is necessary for the script to import cleanly.
• All six Unoise(...) call-sites in ObservationsCfg.PolicyCfg continue to work without modification, as the constructor signature (n_min, n_max) and default additive operation are identical.

Confidence Score: 5/5

Safe to merge — one-line import fix restoring a working tutorial.

The old AdditiveUniformNoiseCfg symbol is absent from the entire codebase, so the previous import would fail on load. UniformNoiseCfg is the correct current export and carries the same additive default, so no functional difference exists. The change is minimal, self-contained, and correct.

No files require special attention.

Important Files Changed

Filename	Overview
scripts/tutorials/03_envs/create_quadruped_base_env.py	Replaces the removed AdditiveUniformNoiseCfg import alias with the current UniformNoiseCfg; behavior is identical since UniformNoiseCfg defaults to additive (operation="add").

Sequence Diagram

sequenceDiagram
    participant Tutorial as create_quadruped_base_env.py
    participant Noise as isaaclab.utils.noise
    participant ObsMgr as ObservationManager

    Tutorial->>Noise: import UniformNoiseCfg as Unoise
    Note over Noise: UniformNoiseCfg(NoiseCfg)<br/>operation="add" (default)
    Tutorial->>ObsMgr: "ObsTerm(noise=Unoise(n_min=..., n_max=...))"
    ObsMgr->>Noise: uniform_noise(tensor, cfg)
    Noise-->>ObsMgr: tensor + uniform sample in [n_min, n_max]

Loading

_{Reviews (1): Last reviewed commit: "Fix quadruped tutorial noise import" | Re-trigger Greptile}

[isaaclab-review-bot]

🤖 Isaac Lab Review Bot — PR #6033

Summary: Import fix replacing deprecated AdditiveUniformNoiseCfg with UniformNoiseCfg in the quadruped tutorial.

✅ Verdict: LGTM

Findings (0 issues):

Check	Result
Import path valid on develop	✅ UniformNoiseCfg is exported from isaaclab.utils.noise in __init__.pyi
Class exists in source	✅ Defined in noise_cfg.py
Behavior preserved	✅ UniformNoiseCfg defaults operation="add", matching the old AdditiveUniformNoiseCfg semantics
Tutorial usage compatible	✅ All usages pass only n_min/n_max kwargs, which are supported by UniformNoiseCfg
CI status	✅ pre-commit and Build Wheel pass; remaining checks pending/skipping (infra)
Scope	✅ Single-line change, tutorial-only, no production code affected

Notes:

• AdditiveUniformNoiseCfg does not appear in the canonical __init__.pyi exports on develop, confirming it is deprecated/removed from the public API.
• The alias as Unoise is preserved, so all downstream usages in the file remain valid without modification.

No issues found. Clean bug fix. 🎉