def get(self, key, fallback=None):
        """
        look up global config values from alot's config

        :param key: key to look up
        :type key: str
        :param fallback: fallback returned if key is not present
        :type fallback: str
        :returns: config value with type as specified in the spec-file
        """
        value = None
        if key in self._config:
            value = self._config[key]
            if isinstance(value, Section):
                value = None
        if value is None:
            value = fallback
        return value