def set_many(self, mapping, timeout=None):
        """Sets multiple keys and values from a mapping.

        :param mapping: a mapping with the keys/values to set.
        :param timeout: the cache timeout for the key (if not specified,
                        it uses the default timeout).
        """
        for key, value in _items(mapping):
            self.set(key, value, timeout)
Sets multiple keys and values from a mapping.

        :param mapping: a mapping with the keys/values to set.
        :param timeout: the cache timeout for the key (if not specified,
                        it uses the default timeout).