Source code for pm4py.algo.transformation.ocel.features.events.new_interactions

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




def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None):
    """
    Discovers the number of new interactions between the related objects which appears in a given event.

    Parameters
    ---------------
    ocel
        OCEL
    parameters
        Parameters of the method

    Returns
    ----------------
    data
        Extracted feature values
    feature_names
        Feature names
    """
    if parameters is None:
        parameters = {}

    ordered_events = (
        parameters["ordered_events"]
        if "ordered_events" in parameters
        else ocel.events[ocel.event_id_column].to_numpy()
    )

    rel_objs = (
        ocel.relations.groupby(ocel.event_id_column)[ocel.object_id_column]
        .agg(list)
        .to_dict()
    )

    interactions = set()
    data = []
    feature_names = ["@@ev_new_interactions"]

    for ev in ordered_events:
        n = 0
        if ev in rel_objs:
            for o1 in rel_objs[ev]:
                for o2 in rel_objs[ev]:
                    if o1 < o2:
                        if not (o1, o2) in interactions:
                            n = n + 1
        data.append([float(n)])

    return data, feature_names