Join binary files.

join.py

#!/usr/bin/env python

from functools import partial
import sys

BLOCKSIZE = 1048576

# Similar to http://bugs.python.org/issue20992
# but with Python 2.x syntax.
def read_blocks(files):
    for filename in files:
        with open(filename, "rb") as f:
            for block in iter(partial(f.read, BLOCKSIZE), b''):
                yield block

if __name__ == '__main__':
    files       = filter(lambda x: x != '', open(sys.argv[1], 'r').read().split('\n'))
    output_file = sys.argv[2]

    with open(output_file, 'wb') as f:
        for block in read_blocks(files):
            f.write(block)