完整報(bào)錯如下:

(Python3.6) appleyuchi@ubuntu19:有序集合$ python example_of_range.py?
Traceback (most recent call last):
? File "example_of_range.py", line 3, in <module>
? ? rank_100_1000 = client.zrange('user_online_status', 0, 4, desc=True, withscores=True)
? File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/redis/client.py", line 2496, in zrange
? ? score_cast_func)
? File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/redis/client.py", line 2622, in zrevrange
? ? return self.execute_command(*pieces, **options)
? File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/redis/client.py", line 839, in execute_command
? ? return self.parse_response(conn, command_name, **options)
? File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/redis/client.py", line 853, in parse_response
? ? response = connection.read_response()
? File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/redis/connection.py", line 717, in read_response
? ? raise response
redis.exceptions.ResponseError: WRONGTYPE Operation against a key holding the wrong kind of value

?

錯誤原因:

redis的存儲數(shù)據(jù)的類型和代碼試圖讀取該數(shù)據(jù)時(shí)使用的函數(shù)不一致.

?

排查方法和解決方案:

localhost:6379> type user_online_status
hash
?

由于代碼中使用了client.zrevrange

這個(gè)函數(shù)是用來讀取zset的,而不是hset的,所以要么重新檢查導(dǎo)入數(shù)據(jù)的方式,

要么刪掉zrevrange,改用hget函數(shù)

?

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