Since Ray-2.7.0, fetch_trial_dataframes is deprecated and raise an DeprecationWarning exception

[dhavalsalwala]

Since Ray-2.7.0 calling fetch_trial_dataframes() raises an exception.

Code in tune_sklearn-0.4.6: tune_sklearn/tune_basesearch.py", line 778, in _format_results

    def _format_results(self, n_splits, out):
        """Helper to generate the ``cv_results_`` dictionary.

        Args:
            n_splits (int): integer specifying the number of folds when doing
                cross-validation.
            out (:obj:`ExperimentAnalysis`): Object returned by `tune.run`.

        Returns:
            results (:obj:`dict`): Dictionary of results to use for the
                interface's ``cv_results_``.

        """
        trials = [
            trial for trial in out.trials if trial.status == Trial.TERMINATED
        ]
        trial_dirs = [trial.logdir for trial in trials]
        # The result dtaframes are indexed by their trial logdir
        trial_dfs = out.fetch_trial_dataframes()

Code in ray-2.7.0: ray/tune/analysis/experiment_analysis.py", line 745, in fetch_trial_dataframes

    def fetch_trial_dataframes(self) -> Dict[str, DataFrame]:
        raise DeprecationWarning(
            "`fetch_trial_dataframes` is deprecated. "
            "Access the `trial_dataframes` property instead."
        )

[TheDohn]

Possibly related: https://github.com/ray-project/ray/issues/40554

[justinvyu]

This will be fixed by https://github.com/ray-project/tune-sklearn/pull/272. I will update this thread once the patch is released.