Python-сообщество

 #!/usr/bin/env python3
# -*- coding: utf-8 -*-
__author__ = 'ipetrash'
import random
import os
import vk_api
from vk_api import VkUpload
# Авторизация по логину/паролю (если нужно по токену, заполнять параметр token)
login, password = 'login', pass'
app_id = '5182500'
vk_session = vk_api.VkApi(login, password, app_id)
vk_session.auth()
upload = VkUpload(vk_session)  # Для загрузки изображений
directory = '11//'
files = os.listdir(directory)
files = [i for i in files if i.endswith('.jpg')]
photos = (directory + random.choice(files))
photo_list = upload.photo_wall(photos)
attachment = ','.join('photo{owner_id}_{id}'.format(**item) for item in photo_list)
vk_session.method("wall.post", {
    'owner_id': '-171537378',  
    'message': 'Test!',
    'attachment': attachment,
})
os.remove(photos)