Source code for pm4py.algo.transformation.ocel.features.objects.object_lifecycle_length

from pm4py.objects.ocel.obj import OCEL
from typing import Optional, Dict, Any




def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None):
    """
    Adds for each object the number of events in its lifecycle as feature

    Parameters
    -----------------
    ocel
        OCEL
    parameters
        Parameters of the algorithm

    Returns
    -----------------
    data
        Values of the added features
    feature_names
        Names of the added features
    """
    if parameters is None:
        parameters = {}

    ordered_objects = (
        parameters["ordered_objects"]
        if "ordered_objects" in parameters
        else ocel.objects[ocel.object_id_column].to_numpy()
    )

    lifecycle_length = (
        ocel.relations.groupby(ocel.object_id_column).size().to_dict()
    )

    data = []
    feature_names = ["@@object_lifecycle_length"]

    for obj in ordered_objects:
        if obj in lifecycle_length:
            data.append([float(lifecycle_length[obj])])
        else:
            data.append([0.0])

    return data, feature_names