def add(self, key, val, time = <NUM_LIT:0>, min_compress_len = <NUM_LIT:0>):
return self._set("<STR_LIT>", key, val, time, min_compress_len)<EOL>
Add new key with value.

Like L{set}, but only stores in memcache if the key doesn't already exist.

@return: Nonzero on success.
@rtype: int