История изменений

Исправление vvn_black, 02.08.23 18:00 (текущая версия) :

import struct

string = 'Hello'
num = 900

with open('test.bin', 'wb') as f:
    f.write(struct.pack(f'>i{len(string)}s', num, string.encode()))

$ hexdump -C test.bin 
00000000  00 00 03 84 48 65 6c 6c  6f                       |....Hello|
00000009

Исходная версия vvn_black, 02.08.23 17:58:

import struct

string = 'Hello'
num = 900

with open('test.bin', 'wb') as f:
    f.write(struct.pack(f'>i{len(string)}s', num, string.encode()))