Source code for pm4py.algo.transformation.ocel.description.variants.variant1

from pm4py.objects.ocel.obj import OCEL
from enum import Enum
from pm4py.util import exec_utils
from typing import Optional, Dict, Any




class Parameters(Enum):
    INCLUDE_TIMESTAMPS = "include_timestamps"





def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None) -> str:
    """
    Provides a textual description of the provided object-centric event log

    Parameters
    --------------
    ocel
        Object-centric event log
    parameters
        Possible parameters of the algorithm, including:
        - Parameters.INCLUDE_TIMESTAMPS => include the timestamps (or not) in the representation

    Returns
    -------------
    ocel_stri
        Textual representation of the object-centric event log
    """
    if parameters is None:
        parameters = {}

    include_timestamps = exec_utils.get_param_value(
        Parameters.INCLUDE_TIMESTAMPS, parameters, True
    )

    object_ots = ocel.objects[
        [ocel.object_id_column, ocel.object_type_column]
    ].to_dict("records")
    object_ots = {
        x[ocel.object_id_column]: x[ocel.object_type_column]
        for x in object_ots
    }
    events = ocel.events.sort_values(
        [ocel.event_timestamp, ocel.event_activity, ocel.event_id_column]
    ).to_dict("records")
    objects = ocel.objects.sort_values(ocel.object_id_column).to_dict(
        "records"
    )
    relations = ocel.relations.sort_values(
        [
            ocel.event_timestamp,
            ocel.event_activity,
            ocel.object_id_column,
            ocel.event_id_column,
        ]
    )
    tdf = relations.groupby(ocel.object_id_column)[ocel.event_timestamp]
    objects_start = tdf.first().to_dict()
    objects_end = tdf.last().to_dict()
    objects_lifecycle = {
        x: objects_end[x].timestamp() - objects_start[x].timestamp()
        for x in objects_start
    }

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

    ret = ["\n\nevents:\n"]

    for ev in events:
        stru = (
            ev[ocel.event_activity]
            + " ( related objects: "
            + ", ".join(relations[ev[ocel.event_id_column]])
            + " ) "
        )
        if include_timestamps:
            stru = stru + " timestamp: " + str(ev[ocel.event_timestamp])
        ret.append(stru)

    ret.append("\nobjects:\n")

    for obj in objects:
        obj_id = obj[ocel.object_id_column]
        stru = obj_id + " object type: " + object_ots[obj_id]
        if include_timestamps:
            stru = (
                stru
                + " ( lifecycle start: "
                + str(objects_start[obj_id])
                + " ; lifecycle end: "
                + str(objects_end[obj_id])
                + " ; lifecycle duration: "
                + str(objects_lifecycle[obj_id])
                + " )"
            )
        ret.append(stru)

    ret = "\n".join(ret)

    return ret