Convert ical file to a csv

ical2csv.py

import sys
import csv
import icalendar

with open(sys.argv[1]) as f:
    cal = icalendar.Calendar.from_ical(f.read())

with open(sys.argv[2], 'w') as f:
    csv.writer(f).writerows(
        (
            e['dtstart'].dt.isoformat()[:19],
            e['dtend'].dt.isoformat()[:19],
            (e['dtend'].dt - e['dtstart'].dt).total_seconds() / 3600,
            e.get('summary', ''),
            e.get('description', ''),
            e.get('location', ''),
            e.get('status', ''),
            str(e.get('organizer', '')).removeprefix('mailto:'),
            ','.join(str(a).removeprefix('mailto:') for a in e.get('attendee', []))
        )
        for e in cal.walk() if e.name == 'VEVENT' and e.get('dtend')
    )