import os
import py7zr
import multivolumefile

ARCHIVE_PATH="/tmp"

random_file_size = 400_240
num_files = 8000
volume_size = 10_000_000

target = f"{ARCHIVE_PATH}/test.tmp"

def random_file():
    with open(target, 'wb') as fout:
        fout.write(os.urandom(random_file_size))

with multivolumefile.open(
        f"{ARCHIVE_PATH}/zip/test.7z",
        mode='wb',
        volume=volume_size,
    ) as multi_handler:
    with py7zr.SevenZipFile(
            multi_handler,
            'w',
        ) as handler:
        for i in range(num_files):
            random_file()
            handler.write(target, f"test{i}.tmp")