update_points.py

from django.core.management.base import BaseCommand
from myapp.models import UserProfile


class Command(BaseCommand):
    help = 'Update points of all users' # help text

    def handle(self, *args, **options):
        for user in UserProfile.objects.all():
            points = 0
            for problem in user.solved_list.all():
                points += problem.type.points
            user.points = points
            self.stdout.write(self.style.SUCCESS('new points of '+str(user)+': '+str(points)))
            user.save()