pyhll - simple library for cardinality detection using HyperLogLog
CI status:
pyhll can be used to compute cardinality, i.e. the unique number of elements in some set using HyperLogLog. This library is a thin python wrapper around HyperLogLog implementation in https://raw.github.com/armon/hlld
Installing
pyhll can be installed via pypi:
pip install pyhll
Building
Get the source:
git clone https://github.com/blackwithwhite666/pyhll.git
Compile extension:
python setup.py build_ext --inplace
Usage
from pyhll import Cardinality c = Cardinality() c.add(b'foo') assert 1 == len(c) c.add(b'bar') assert 2 == len(c) c.add(b'bar') assert 2 == len(c) c.update([b'bar', b'buzz']) assert 3 == len(c)
Running the test suite
Use Tox to run the test suite:
tox
References
Here are some related works which we make use of:
HyperLogLog in Practice: Algorithmic Engineering of a State of The Art Cardinality Estimation Algorithm : http://research.google.com/pubs/pub40671.html
HyperLogLog: The analysis of a near-optimal cardinality estimation algorithm : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.142.9475
Changelog
0.2.4
Add dump and load support;
0.2.3
Add support for fluent iface;
0.2.1-0.2.2
Fix build on CentOS;
0.2.0
Add ability to union sets;
Add serialization support;
0.1.1
Exclude autoconf artifacts from sdist.
0.1.0 (initial release)
Prototype.
1 maintainer
Metadata
1 maintainer
Release files for pyhll 0.2.4
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