Python如何调用rar命令

import os

import time

source = [r‘D:\Work\Python\Demo‘, ‘d:\\work\\linux‘]

target_dir = ‘D:\\Work\\backup\\‘

target = target_dir + time.strftime(‘%Y%m%d%H%M%S‘) + ‘.rar‘

zip_command = "rar a %s %s" % (target, ‘ ‘.join(source))

if os.system(zip_command) == 0:

    print ‘Sucessful backup to‘, target

else:

    print ‘Backup Failed‘