Take from a more recent redis.py, parse_info

def _parse_dict_string(self, string, key, default):
        """Take from a more recent redis.py, parse_info"""
        try:
            for item in string.split(','):
                k, v = item.rsplit('=', 1)
                if k == key:
                    try:
                        return int(v)
                    except ValueError:
                        return v
            return default
        except Exception:
            self.log.exception("Cannot parse dictionary string: %s" % string)
            return default