<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def setup(self, redis_conn=None, host='localhost', port=6379):
        '''
        Set up the counting manager class

        @param redis_conn: A premade redis connection (overrides host and port)
        @param host: the redis host
        @param port: the redis port
        '''
        AbstractCounter.setup(self, redis_conn=redis_conn, host=host,
                              port=port)

        self._threaded_start()