Installation:
Use pip install hyperloglog to install from PyPI.
Usage:
import hyperloglog
hll = hyperloglog.HyperLogLog(0.01) # accept 1% counting error
hll.add("hello")
print(len(hll)) # 1
hll.add("hello")
print(len(hll)) # 1 as items aren't added more than once
hll.add("hello again")
print(len(hll)) # 2If we add a further 1000 random strings (giving a total of 1002 strings) we’ll have a count roughly within 1% of the true value, in this case it counts 1007 (within +/- 10.2 of the true value)
# add 1000 random 30 char strings to hll
import random
import string
[hll.add("".join([string.ascii_letters[random.randint(0, len(string.ascii_letters)-1)] for n in range(30)])) for m in range(1000)]
print(len(hll)) # 1007Changes:
Added Sliding window HLL version
Added bias correction from HLL++
References:
1 maintainer
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