gistfile1.txt

import re

from order import Order, BundleOrders

def parser(html=None, plain=None, attachments=None, debug=False):
    if html == None:
        html = ''
    if plain == None:
        plain = ''

    message_contents = '{0}{1}'.format(html, plain)

    patterns = [
        'Products Ordered:',
        'Your Total',
    ]

    positive_matches = []
    for pattern in patterns:
        if re.search(pattern, message_contents):
            positive_matches.append(pattern)

    if len(positive_matches) == 0:
        error_message = 'The message doesn\'t contain any of the patterns.'
    else:
        error_message = 'The message contained pattern(s): '
        for positive_match in positive_matches[:-1]:
            error_message += '"{0}", '.format(positive_match)
        if len(positive_matches) > 1:
            error_message += 'and '
        error_message += '"{0}".'.format(positive_matches[-1])
    raise StandardError(error_message)

    order = Order(merchant='Acme')
    orderbundle = BundleOrders(order)
    return orderbundle