[`Tools/ros2/ardupilot_dds_tests/test/test_pep257.py`](https://github.com/ArduPilot/ardupilot/blob/master/Tools/ros2/ardupilot_dds_tests/test/test_pep257.py) ensures [PEP 257 – Docstring Conventions](https://peps.python.org/pep-0257) compliance for all Python files in Tools/ros2.
Partially addresses the concern at
* https://github.com/ArduPilot/ardupilot/pull/30426#issuecomment-2994329025
Here are two solutions (we should pick just one) that replicate this functionality in pre-commit.
1. Use `flake8` plus `flake8-docstring` to run the 'ament-style` rules on Tools/ros2.
2. Run [`ament_pep257`](https://pypi.org/project/ament-lint-pep257) on Tools/ros2.
Quick equivalent commands:
```
uv tool run --with=flake8-docstrings flake8 --select=D \
--ignore=D100,D101,D102,D103,D104,D105,D106,D107,D203,D212,D404 Tools/ros2
uv tool run --from=ament-lint-pep257 ament_pep257 Tools/ros2 > /dev/null
```
How was this tested?
1. Run both equivalent commands to ensure no errors.
2. `pre-commit run flake8 --all-files` to ensure no errors.
3. `pre-commit run ament-pep257 --all-files` to ensure no errors.
Edit `Tools/ros2/ardupilot_sitl/src/ardupilot_sitl/utilities.py` and add a leading or trailing space inside the docstring, and save the file.
Rerun the four commands to ensure that each raises a `D210: No whitespaces allowed surrounding docstring text` error.
Christian Clauss
dependabot[bot]