File checksum

checksum.py

#!/usr/bin/env python

import zlib
import hashlib

class Adler32CheckSum():
    @staticmethod
    def checksum(filename, blocksize=1048576):
        value = 1
        with open(filename, "rb") as f:
            for block in iter(lambda: f.read(blocksize), ""):
                value = zlib.adler32(block, value)
        return hex(value & 0xffffffff).lower().replace('l','').replace('x','0')[-8:]

class Md5CheckSum():
    @staticmethod
    def checksum(filename, blocksize=1048576):
        hash = hashlib.md5()
        with open(filename, "rb") as f:
            for block in iter(lambda: f.read(blocksize), ""):
                hash.update(block)
        return hash.hexdigest()

if __name__ == '__main__':
    print Adler32CheckSum.checksum('/bin/ls')
    print Md5CheckSum.checksum('/bin/ls')