Formatting horrible if

fields.py

    def run_validators(self, value):
        if value in validators.EMPTY_VALUES:
            return
        errors = []
        for v in self.validators:
            try:
                v(value)
            except ValidationError, e:
                message = None
                if hasattr(e, 'code'):
                    messages = self.default_error_messages.copy()
                    messages.update(self.error_messages)
                    message = messages.get(e.code, '')
                    if getattr(e, 'params', None):
                        message = message % e.params
                if message:
                    errors.append(message)
                else:
                    errors.extend(e.messages)
        if errors:
            raise ValidationError(errors)