def __init__(self, key, host='<STR_LIT:localhost>', port=<NUM_LIT>, conn = None):
self.key = key<EOL>self.redis = conn if conn is not None else Redis(<EOL>connection_pool = ConnectionPool(host=host, port=port))<EOL>
Create a new AutoCompleter client for the given key, and optional host and port

If conn is not None, we employ an already existing redis connection