Pretty formatting of meeting invites (for use in mutt etc).

ical_print.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# To parse ics attachments in mutt, put this in your ~/.mailcap:
#
#   text/calendar; /path/to/ical_print.py; copiousoutput
#
# Otherwise, you can either pass a an .ics file as a parameter, or pipe
# something to it on stdin.
#
# Requires icalendar & unideocode:
#
#  % pip install icalendar unidecode

import fileinput
from unidecode import unidecode
from icalendar import Calendar, Event
from icalendar.prop import vCalAddress, vDDDTypes


def _fmt_event_attr(event, thing, label=None):
    label = label or thing
    val = event.get(thing, '')
    if isinstance(val, vDDDTypes):
        val = str(val.dt.strftime('%A %d %B - %H:%M'))
    elif isinstance(val, vCalAddress):
        val = val.params.get('CN')
    else:
        val = unidecode(unicode(val))
    return '%s: %s' % (label.ljust(12), val)


def print_calendar(cal_str):
    cal = Calendar.from_ical(cal_str)
    for part in cal.walk():
        if isinstance(part, Event):
            print(_fmt_event_attr(part, 'organizer'))
            print(_fmt_event_attr(part, 'summary'))
            print(_fmt_event_attr(part, 'dtstart', 'start'))
            print(_fmt_event_attr(part, 'dtend', 'end'))
            print(_fmt_event_attr(part, 'location'))
            print(_fmt_event_attr(part, 'contacts'))
            print(_fmt_event_attr(part, 'description'))


if __name__ == '__main__':
    lines = []
    for line in fileinput.input():
        lines.append(line)

    print_calendar('\n'.join(lines))