Python standard library: struct

Writing integers

import struct

nums = [
   0x61626364,  # abcd in hex
   10,
   1, 256, 65536
]

with open('/tmp/struct.out', 'wb') as f:
     f.write(struct.pack( 'i' * len(nums), *nums))

$ od -t d4z --width=4 /tmp/struct.out
0000000  1633837924  >dcba<
0000004          10  >....<
0000010           1  >....<
0000014         256  >....<
0000020       65536  >....<
0000024

See also