'''
This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
PM4Py is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
PM4Py is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PM4Py. If not, see <https://www.gnu.org/licenses/>.
'''
from pm4py.objects.ocel.obj import OCEL
from typing import Optional, Dict, Any
[docs]def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None):
"""
Adds for each object as features:
- the duration of its lifecycle
- the start timestamp
- the end timestamp
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 = list(ocel.objects[ocel.object_id_column])
first_object_timestamp = ocel.relations.groupby(ocel.object_id_column).first()[ocel.event_timestamp].to_dict()
last_object_timestamp = ocel.relations.groupby(ocel.object_id_column).last()[ocel.event_timestamp].to_dict()
data = []
feature_names = ["@@object_lifecycle_duration", "@@object_lifecycle_start_timestamp", "@@object_lifecycle_end_timestamp"]
for obj in ordered_objects:
se = first_object_timestamp[obj].timestamp()
ee = last_object_timestamp[obj].timestamp()
data.append([ee - se, se, ee])
return data, feature_names