pm4py.filtering.filter_directly_follows_relation(log: Union[EventLog, DataFrame], relations: List[str], retain: bool = True, activity_key: str = 'concept:name', timestamp_key: str = 'time:timestamp', case_id_key: str = 'case:concept:name') Union[EventLog, DataFrame][source]#

Retain traces that contain any of the specified ‘directly follows’ relations. For example, if relations == [(‘a’,’b’),(‘a’,’c’)] and log [<a,b,c>,<a,c,b>,<a,d,b>] the resulting log will contain traces describing [<a,b,c>,<a,c,b>].

  • log – event log / Pandas dataframe

  • relations – list of activity name pairs, which are allowed/forbidden paths

  • retain (bool) – parameter that says whether the paths should be kept/removed

  • activity_key (str) – attribute to be used for the activity

  • timestamp_key (str) – attribute to be used for the timestamp

  • case_id_key (str) – attribute to be used as case identifier

Return type:

Union[EventLog, pd.DataFrame]

import pm4py

filtered_dataframe = pm4py.filter_directly_follows_relation(dataframe, [('A','B'),('A','C')], activity_key='concept:name', case_id_key='case:concept:name', timestamp_key='time:timestamp')