b43036c98bf478ef5b12ce415652a4a8e046c617,optuna/visualization.py,,_get_parallel_coordinate_plot,#Any#Any#,203

Before Change

    trials = study.trials

    param_names = set()
    for t in trials:
        for p_name in t.params.keys():
            param_names.add(p_name)
    if len(params) != 0:

After Change

    param_names = {p_name for t in trials for p_name in t.params.keys()}
    if len(params) != 0:
        for p_name in params:
            if p_name not in param_names:
                logger.warning("Parameter {} does not exist in your study.".format(p_name))
                return go.Figure(data=[], layout=layout)
        param_names = set(params)
    sorted_param_names = sorted(list(param_names))

    dims = [{

Instances