# import redis
# from datetime import datetime
#
#
# class RedisCache(object):
#     """ Redis操作函数 """
#
#     def connect(self, host, port, db, password):
#         pool = redis.ConnectionPool(host=host,
#                                     port=port,
#                                     db=db,
#                                     password=password,
#                                     decode_responses=True)
#         self.r = redis.Redis(connection_pool=pool)
#
#     def set(self, key, value, expired=None):
#         if isinstance(value, str):
#             if expired and isinstance(expired, datetime):
#                 dif = expired - datetime.now()
#                 seconds = int(dif.total_seconds())
#                 if seconds < 0:
#                     seconds = 0
#                 expired = seconds
#             else:
#                 expired = None
#
#             self.r.set(key, value, ex=expired)
#
#     def get(self, key):
#         return self.r.get(key)
#
#     def ttl(self, key):
#         return self.r.ttl(key)
#
#     def expire(self, key, time):
#         return self.r.expire(key, time)
#
#     def sadd(self, name, value):
#         return self.r.sadd(name, value)
#
#     def smembers(self, name):
#         return self.r.smembers(name)
#
#     def delete(self, name):
#         self.r.delete(name)
