offset = date.tzinfo.utcoffset(date)

        timezone = (offset.days * 24 * 60) + (offset.seconds / 60)

        hour, minute = divmod(timezone, 60)

        return time_str + "%+03d:%02d" % (hour, minute)

    else:

        return date.strftime('%Y-%m-%dT%H:%M:%SZ')

# From ``django.utils.feedgenerator`` via webhelpers.feedgenerator

def get_tag_uri(url, date):

    "Creates a TagURI. See http://diveintomark.org/archives/2004/05/28/howto-atom-id"

    tag = re.sub('^http://', '', url)

    if date is not None:

    tag = re.sub('#', '/', tag)

    return 'tag:' + tag

class Attributes(object):

    """Simple namespace for attribute dict access in mako and elsewhere"""

    def __init__(self, a_dict):

        self.__dict__ = a_dict

class _Feeder(object):