Pm4py: contoh minimal dari csv

Berikut adalah minimal source code untuk menggunakan [PM4Py](https://pm4py.fit.fraunhofer.de/) — library Python yang digunakan untuk Process Mining, biasanya dengan input berupa event logs. PM4Py umumnya menggunakan file input dalam format XES, CSV, atau Parquet.

Contoh Format File Input (`event_log.csv`):

case_id,activity,timestamp
1,Start,2024-01-01 08:00:00
1,Check,2024-01-01 08:15:00
1,Approve,2024-01-01 08:45:00
2,Start,2024-01-01 09:00:00
2,Check,2024-01-01 09:10:00
2,Reject,2024-01-01 09:30:00

Kolom wajib:

• `case_id`: ID proses unik (setiap satu proses memiliki banyak aktivitas)
• `activity`: nama aktivitas
• `timestamp`: waktu aktivitas dilakukan

Minimal Source Code (PM4Py with CSV)

import pandas as pd
from pm4py.objects.conversion.log import converter as log_converter
from pm4py.algo.discovery.alpha import algorithm as alpha_miner
from pm4py.visualization.petrinet import visualizer as pn_visualizer
from pm4py.objects.log.util import dataframe_utils

# 1. Load CSV event log
df = pd.read_csv("event_log.csv")

# 2. Format timestamps properly
df['timestamp'] = pd.to_datetime(df['timestamp'])

# 3. Ensure column names match PM4Py expectations
df = dataframe_utils.convert_timestamp_columns_in_df(df)

# 4. Convert to event log object
event_log = log_converter.apply(df, parameters={
    log_converter.Variants.TO_EVENT_LOG.value.Parameters.CASE_ID_KEY: 'case_id'
})

# 5. Discover process model using Alpha Miner
net, initial_marking, final_marking = alpha_miner.apply(event_log)

# 6. Visualize Petri Net
gviz = pn_visualizer.apply(net, initial_marking, final_marking)
pn_visualizer.view(gviz)

Cara Install PM4Py

pip install pm4py

> Jika kamu pakai Jupyter atau Google Colab, tambahkan `!pip install pm4py` di atas cell.

Kalau kamu mau pakai format lain seperti XES, tinggal ubah bagian `pd.read_csv(...)` menjadi:

from pm4py.objects.log.importer.xes import factory as xes_importer
log = xes_importer.apply("your_log.xes")

Pranala Menarik

• Process Mining