redict.py

#!/usr/bin/python

# redict - redis based dictionary
# this version uses UserDict and a mostly cached redis data for low I/O impact
# almost always consistent dict. to make sure you have all latest data run __sync() periodically
# gleicon 2010 - http://zenmachine.wordpress.com - http://github.com/gleicon - http://7co.cc

import redis
from UserDict import UserDict
import time

class ReDict(UserDict):
    def __init__(self, server='127.0.0.1', port=6379, hkey=None):
        self.server = server
        self.port = port
        self.redis_conn = redis.Redis(host=self.server, port=self.port)
        UserDict.__init__(self)
        if hkey == None: 
            self.hkey = "redict:%s" % time.time()
            self.data={}
        else: 
            self.hkey = hkey
            self.__sync

    def __setitem__(self, key, value):
        self.redis_conn.hset(self.hkey, key, value)
        UserDict.__setitem__(self, key, value)
        self.data = self.redis_conn.hgetall(self.hkey)

    def __sync(self):
        self.data = self.redis_conn.hgetall(self.hkey)

if __name__ == '__main__':
    #rd = ReDict(hkey="lero") 
    rd = ReDict()
    rd['oi'] = 1
    rd['ei'] = 10
    rd['ai'] = 100
    print rd['oi']
    print rd.has_key('oi')
    print rd.has_key('xei')
    print rd.keys()
    print rd.values()
    print rd.items()