def parse_date_time(self, input):
field = DateTimeField()
try:
return field.to_python(input)
except ValidationError:
pass
match = self.duration_re.match(input)
if match:
kwargs = dict((k, int(v)) for (k, v) in match.groupdict().items() if v is not None)
return timezone.now() - timedelta(**kwargs)
raise ValueError("%s could not be interpereted as a datetime" % input)
