Python scan查找Redis集群中的key

import redis
import sys
from rediscluster import StrictRedisCluster
#host = "172.17.155.118"
#port = 6379
#passwd = ""
instance_ip = sys.argv[1]
instance_port = sys.argv[2]
startup_nodes = [{"host": instance_ip, "port": instance_port }]
rc = StrictRedisCluster(startup_nodes=startup_nodes, decode_responses=True, password="")
def check_key(rc,k):
    key_len = 0
    big_key = []
    try:
        type = rc.type(k)
        if type == "string":
            key_len = rc.strlen(k)
        elif type == "hash":
            key_len = rc.hlen(k)
        elif type == "list":
            key_len = rc.llen(k)
        elif type == "set":
            key_len = rc.scard(k)
        elif type == "zset":
            key_len = rc.zcard(k)
        else:
            print("Redis key type: "+type)
    except Exception:
        print("Redis key type error.")
    if key_len > 5:
        big_key.append(k)
        big_key.append(type)
        big_key.append(key_len)
        print(big_key)

def scan_key(rc):
    rc_end = []
    try:
        rc_end = rc.scan_iter("*")
    except Exception as e:
        pass
        #print(e)
    for k in rc_end:
        check_key(rc,k)

if __name__ == '__main__':
    scan_key(rc)

import redis
import sys

db_host = ""
db_port = 
r = redis.StrictRedis(host=db_host, port=int(db_port))
for k in r.scan_iter("lie*"):
    print k