django querset group by sum

To achieve a Django queryset group by sum, you can follow these steps:

1. Use the annotate() function to perform the grouping and summing operation.
2. Pass the Sum() function from django.db.models to the annotate() function, specifying the field to be summed.
3. Chain the values() function to the queryset to retrieve the grouped and summed results.
4. Optionally, use the order_by() function to order the results based on a specific field.

These steps will allow you to perform a group by sum operation using Django's queryset capabilities.