Returns a Redis Client

def _setup_redis(self):
        """Returns a Redis Client"""
        if not self.closed:
            try:
                self.logger.debug("Creating redis connection to host " +
                                  str(self.settings['REDIS_HOST']))
                self.redis_conn = redis.StrictRedis(host=self.settings['REDIS_HOST'],
                                              port=self.settings['REDIS_PORT'],
                                              db=self.settings['REDIS_DB'])
                self.redis_conn.info()
                self.redis_connected = True
                self.logger.info("Successfully connected to redis")
            except KeyError as e:
                self.logger.error('Missing setting named ' + str(e),
                                   {'ex': traceback.format_exc()})
            except:
                self.logger.error("Couldn't initialize redis client.",
                                   {'ex': traceback.format_exc()})
                raise