bitmap

BitMap for python

This package provides a BitMap class which is an array of bits stored in compact format.

Installation

bitmap can be installed from pip:

$ sudo pip install bitmap

Functions

• BitMap(maxnum): construct a BitMap object with maxnum bits
• set(pos): set the bit at position pos to 1
• reset(pos): reset the bit at position pos to 0
• flip(pos): flip the bit at position pos
• count(): return the number of 1s
• size(): return the size of the BitMap
• test(pos): check if bit at position pos has been set to 1
• any(): check if any bit in the BitMap has been set to 1
• none(): check if none of the bits in the BitMap has been set to 1
• all(): check if all bits in the BitMap has been set to 1
• nonzero(): return indexes of all non-zero bits
• tostring(): convert a BitMap object to 0 and 1 string
• fromstring(bitstring): create a BitMap object from 0 and 1 string

Examples

from bitmap import BitMap
bm = BitMap(32)
print bm.tostring()
bm.set(1)
print bm.tostring()

bm = BitMap.fromstring("00011101")
print bm.tostring()
bm.flip(1)
print bm.tostring()