def get(self, keys, default=None):
        """
        To get a value by dot notation
        :param keys: dot notaion string
        :param default:
        :return:
        """
        try:
            d = self
            for k in keys.split("."):
                if not k in d:
                    d[k] = {}
                d = d[k]
            if isinstance(d, bool):
                return d
            return d or default
        except (TypeError, KeyError) as e:
            return default
To get a value by dot notation
        :param keys: dot notaion string
        :param default:
        :return: