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README.md

Introduction

python cffi binding for Roaring bitmaps in C, what is RoaringBitmap? please visit: https://github.com/RoaringBitmap/CRoaring just use it as a Set of integer elements!

Install:

pip install git+https://github.com/sunzhaoping/python-croaring.git

or

pypy setup.py build && pypy setup.py install

Demo:

# import the croaring module
from croaring import BitSet

# create a bitmap like set
s = BitSet([1,2,3,4,5,6,7])

# count the elements
len(s)

# if a element in set
1 in s

# if another set in current set
other =  BitSet([1,2,3,4,5,6])
other in s

# iterate it
[ element for element in s]

# and or xor them
s & other
s | other
s ^ ohter

# add or sub them
s - other
s + other

# get the index of a element
s.index(7)

# get the element from index
s[0]

#serialize to a buffer
buf = s.dumps()

#deseialize from buffer
s.loads(buf)

# add element
s.add(8)

# remove element
s.remove(8)

# discard element
s.discard(8)

#union many sets
new = BitSet.union(s, other)
new = BitSet.union_heap(s, other)

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A cffi python wrapper for C Roaring Bitmaps.

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