import vk
import requests
import json
import random

session = vk.AuthSession(access_token='токен сообщества', scope='photos')
vkapi = vk.API(session, v='5.101')
target_id = 'user id'

data = vkapi.photos.getMessagesUploadServer(user_id=target_id)


upload_url = data["upload_url"]
files = {'photo': open("название твой фотки", 'rb')}

response = requests.post(upload_url, files=files)
result = json.loads(response.text)
print(result)
uploadResult = vkapi.photos.saveMessagesPhoto(server=result["server"],
                                              photo=result["photo"],
                                              hash=result["hash"])

print(uploadResult[0]['id'])
attachment = 'photo'+ str('id группы') + '_' + str(uploadResult[0]['id'])

vkapi.messages.send(user_id=target_id,
                    random_id=random.randint(1, 10 ** 9),
                    message="randomTextMessage",
                    attachment=attachment)