'''
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, Set, Tuple
[docs]def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None) -> Set[Tuple[str, str]]:
"""
Calculates the object interaction graph. Two objects are connected iff they are both related to an event
of the OCEL.
Parameters
-----------------
ocel
Object-centric event log
parameters
Parameters of the algorithm
Returns
-----------------
object_interaction_graph
Object interaction graph (as set of tuples; undirected)
"""
if parameters is None:
parameters = {}
graph = set()
ev_rel_obj = ocel.relations.groupby(ocel.event_id_column)[ocel.object_id_column].apply(list).to_dict()
for ev in ev_rel_obj:
rel_obj = ev_rel_obj[ev]
for o1 in rel_obj:
for o2 in rel_obj:
if o1 < o2:
graph.add((o1, o2))
return graph