Python implementation of a bitarray
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README.md
bitarray.py
pysieve.py
test_bitarray.py

README.md

bitarray

Full Python implementation of a bitarray.

Memory optimization: It packs 32 or 64 bits on a float. Depending on the platform.

Blog entry with explanation on: jordiburgos.com/post/2014/python-bitarray-sieve-Eratosthenes.html

Usage:

MAX = 2^^32

ba = BitArray(MAX, initialize=1)
for n in xrange(2, MAX, 2):
    ba.reset_bit(n)

ba.set_bit(120)

if ba.get_bit(120):
    pass

Sample usage on pysieve.py