def get_prep_value(self, value):
        if value and value in ':':
            try:
                return clean_ipv6_address(value, self.unpack_ipv4)
            except exceptions.ValidationError:
                pass
        return value
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/models/fields/__init__.py/GenericIPAddressField.get_prep_value/swapped operands of `in`