# -*- coding: utf-8 -*-
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import six
import datetime
import isodate
from ..config import ERROR
# Module API
def cast_duration(format, value, **options):
if not isinstance(value, (isodate.Duration, datetime.timedelta)):
if not isinstance(value, six.string_types):
return ERROR
try:
value = isodate.parse_duration(value)
except Exception:
return ERROR
return value
