'LGBMRegressor' object has no attribute 'n_estimators_'

[phantng]

Description

The 'LGBMRegressor' object has no attribute 'n_estimators_' but it does have 'n_estimators', which is inconsistent with the documentation in https://lightgbm.readthedocs.io/en/latest/pythonapi/lightgbm.LGBMRegressor.html.

Reproducible example

model = lgb.LGBMRegressor(**model_config)
model = model.fit(x_train, y_train)
...
print(model.n_estimators_)

Environment info

lightgbm=3.3.2
python=3.9.7

[jmoralez]

Hi @phantng, thanks for raising this. The docs point to the latest version, which is what is currently on master. The n_estimators_ attribute was added in #4753 so you can access it now but not on 3.3.2. On the bottom of the left sidebar of the docs page you can switch the version to 3.3.2 where you won't find n_estimators_.

[jmoralez]

@jameslamb @StrikerRUS can we make the default page be the latest release (3.3.2 in this case) instead of the current master on readthedocs? It can be very confusing finding things that aren't there yet and getting errors, and we've had a couple of issues because of it (#5113 comes to mind but I think we've had some more).

[jameslamb]

Thanks for bringing it up @jmoralez . I have been meaning to open an issue about that since #5185, your @ reminded me to do it. Created #5342 . Let's move the discussion about what to do with the docs site over there.

Based on the 👍 from @phantng on #5337 (comment), I'm going to close this issue.

[github-actions]

This issue has been automatically locked since there has not been any recent activity since it was closed. To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues including a reference to this.