Source code for pm4py.statistics.rework.cases.log.get

from enum import Enum
from typing import Optional, Dict, Any, Union

from pm4py.objects.log.obj import EventLog
from pm4py.util import exec_utils, constants, xes_constants




class Parameters(Enum):
    ACTIVITY_KEY = constants.PARAMETER_CONSTANT_ACTIVITY_KEY
    CASE_ID_KEY = constants.PARAMETER_CONSTANT_CASEID_KEY





def apply(
    log: EventLog,
    parameters: Optional[Dict[Union[str, Parameters], Any]] = None,
) -> Dict[str, Dict[str, int]]:
    """
    Computes for each trace of the event log how much rework occurs.
    The rework is computed as the difference between the total number of activities of a trace and the
    number of unique activities.

    Parameters
    ----------------
    log
        Event log
    parameters
        Parameters of the algorithm, including:
        - Parameters.ACTIVITY_KEY => the activity key
        - Parameters.CASE_ID_KEY => the case identifier attribute

    Returns
    -----------------
    dict
        Dictionary associating to each case ID:
        - The number of total activities of the case (number of events)
        - The rework (difference between the total number of activities of a trace and the number of unique activities)
    """
    if parameters is None:
        parameters = {}

    activity_key = exec_utils.get_param_value(
        Parameters.ACTIVITY_KEY, parameters, xes_constants.DEFAULT_NAME_KEY
    )
    case_id_key = exec_utils.get_param_value(
        Parameters.CASE_ID_KEY, parameters, xes_constants.DEFAULT_TRACEID_KEY
    )

    rework_cases = {}
    for trace in log:
        activities = list([x[activity_key] for x in trace])
        unique_activities = set(activities)
        rework = len(activities) - len(unique_activities)
        rework_cases[trace.attributes[case_id_key]] = {
            "number_activities": len(activities),
            "rework": rework,
        }

    return rework_cases