Python / Redis : Get Bitset string

Question

I'm wondering how i can get the string value of a bitset in redis, i have the following code :

import redis as redis


def main():
    redisClient = redis.StrictRedis(host='localhost', port=6379, db=0)
    redisClient.setbit("mybitset",5,1)
    bitset=redisClient.get("mybitset")
    print bitset # expect the output to be 100000


if __name__=="__main__":
    main()

srgerg · Accepted Answer · 2011-12-01 02:30:34Z

4

If I understand correctly the redisClient.get("mybitset") call returns a string containing the binary data. Try replacing your print bitset with:

print "{0:b}".format(ord(bitset[0]))

This will only work if your bitset is one byte long. If it spans multiple bytes try using the struct module. For example, if it is two bytes long (i.e. a short):

print "{0:b}".format(struct.unpack(">h", bitset)[0])

answered Dec 1, 2011 at 2:30

srgerg

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1 Comment

newbie Over a year ago

Doesn't work : using the first print i get output as 100, using the second option print "{0:b}".format(struct.unpack(">h", bitset)[0]) I get error struct.error: unpack requires a string argument of length 2

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