import vk_api
import time
import requests
import random

akk = vk_api.VkApi(password = '', login ='')
akk.auth()

dialogs = akk.method('messages.getDialogs', {'count': 200, 'unread': 0, 'important': 0, 'unanswered': 0})
friends = akk.method('friends.get', {})

for dialog in dialogs['items']:
    try:
        if not(dialog['message']['user_id'] in friends['items']):
            akk.method('messages.deleteDialog', {'user_id' : dialog['message']['user_id']})
    except:
        time.sleep(30)