#!/usr/bin/env python
from email.utils import parseaddr
from smtplib import SMTP
from argparse import ArgumentParser, ArgumentTypeError


if __name__ == '__main__':
    parser = ArgumentParser(description='send an email')
    parser.add_argument('--sender', required=True, help='mail sender')
    parser.add_argument('--to', required=True, help='mail recipient')
    parser.add_argument('--cc', nargs='*', help='cc recipients')
    parser.add_argument('--bcc', nargs='*', help='bcc recipients')
    parser.add_argument('--subject', help='subject')
    group = parser.add_mutually_exclusive_group(required=True)
    group.add_argument('body', nargs='?', help='the mail content')
    group.add_argument('--file', help='file with mail content')
    args = parser.parse_args()

    args.recipients = [args.to]
    if args.cc: args.recipients += args.cc
    if args.bcc: args.recipients += args.bcc
    if args.file:
        with open(args.file, 'r') as ifh:
            args.body = ifh.read()
        del args.file
        
    print(args)