What does the variable os.sep matter?

[elysha]

What role does the variable os.sep play in this violin and what does it need? I'd like to hear a detailed answer, thank you in advance!

import os
import time
source = '"C:\my documents"'
target_dir = 'D:\backup\'

target = target_dir + os.sep + time.strftime('%Y%m%d%H%M%S') + '.zip'
zip_command = "zip -qr {0} {1}".format(target, source)
if os.system(zip_command) == 0:

print('Резервная копия успешно создана в', target)

else:

print('Создание резервной копии не удалось')

[derk]

You don't have to use it. os.sep to shape the file. Better use it. https://docs.python.org/3/library/os.path.html#os.path.join :

from datetime import datetime as DT
target_dir = 'D:\backup'

target = os.path.join(target_dir, f"{DT.now():%Y%m%d%H%M%S}.zip")