Key/value store wrapper to redis

kvstore.py

import redis

class KVStore:
    def __init__(self, prefix, host='localhost', port=6379, **params):
        self._prefix = prefix
        self._db = redis.Redis(host=host, port=port)

    def _get_prefix(self, key):
        return '%s:%s' % (self._prefix, key)

    def set(self, key, value):
        prefix = self._get_prefix(key)
        self._db.set(prefix, value)

    def get(self, key, value):
        prefix = self._get_prefix(key)
        item = self._db.get(prefix)
        if item:
            return item
        return None

    def set_set(self, key, value):
        prefix = self._get_prefix(key)
        self._db.sadd(prefix, value)

    def get_set(self, key, as_list=True):
        prefix = self._get_prefix(key)
        items = self._db.smembers(prefix)
        if len(items) > 0:
            if as_list:
                return list(items)
            return items
        return None