Python IMAP mail notifier

newmail.py

#!/usr/bin/env python3

import easyimap
import re
import os
from dateutil.parser import parse

def message_summary(date, title, from_addr):
    d = parse(date).strftime('%b %d %I:%M %p') if date is not None else '<unparsed>'
    a = re.search('\<(.*)>', from_addr).groups()[0] if '<' in from_addr else from_addr
    return '{} | {:40.40} | {:98.98}'.format(d, a, re.sub(r'\r?\n?', '', title))

def main():
  try:
    imap = easyimap.connect(os.getenv("newmail_host"), os.getenv('newmail_user'), os.getenv('newmail_password'), os.getenv('newmail_mailbox', 'inbox'), read_only=True)
    messages = list(map((lambda m: message_summary(m.date, m.title, m.from_addr)), imap.unseen(10)))
    if len(messages) > 0:
      print("\n".join(messages))
    else:
      print("[No new messages]")
  finally:
    imap.quit()

if __name__ == '__main__':
  main()