Updating selection of objects, each with a different value in bulk (Django)

Question

Imagine I have a python dictionary where keys are existing user ids, and values are scores to be added to those users\' existing scores.

For example: {1: 1580

Answer 1

transaction.atomic() proposed by @nik_m is good idea, but also you should get records from database in single request.

from django.db.models import F
from django.db import transaction

with transaction.atomic():
    scores = {1: 1580, 4: 540, 2: 678}
    users_to_update = UserProfile.objects.filter(
        user_id__in=scores.keys()
    ) 
    for user in users_to_update:
        user.update(score=F('score') + scores[user.user_id])