Is accessing fields like Observation.round_wind officially supported?

[eitaar]

Hi, I have a question about the Python Observation API.

I noticed that fields such as round_wind, honba, scores, discards, and dora_indicators are accessible at runtime:

obs = env.get_observations()[0]
print(obs.round_wind)

0

This works correctly, but static type checkers report errors such as:

Object of type "Observation" has no attribute "round_wind"

From what I can see, these fields exist on the Rust Observation struct and are exposed to Python, but some of them do not appear to be declared on the 4-player Observation class in _riichienv.pyi.

So I wanted to ask: are fields such as round_wind, honba, scores, discards, etc. intended to be part of the public Python API for Observation?

If so, would it be reasonable for the 4-player Observation type stub to expose these fields as well?

I just want to make sure I am using the intended API before relying on these attributes in my project. If there is another recommended way to access this information, I would be happy to use that instead.

Thank you!

[eitaar]

Environment

• OS: Microsoft Windows 11 Pro 64-bit
• OS version: 10.0.26200 (Build 26200)
• Architecture: AMD64
• Python: CPython 3.14.4 (64-bit)
• RiichiEnv: 0.4.8
• ty: 0.0.75
• uv: 0.12.2
• VS Code ty extension: 2026.70.0
• VS Code Python extension: 2026.4.0
• Installed extension module:
  _riichienv.cp314-win_amd64.pyd

Minimal reproduction

from riichienv import RiichiEnv

env = RiichiEnv()
obs = next(iter(env.reset().values()))

print(obs.round_wind)