models.py

# coding: utf-8
# Есть такой код. Сделайте что-нибудь с Item.get_options().

from django.db import models


class Item(models.Model):
    # .....

    def get_options(self):
        topics = []
        for topic in Topic.objects.all():
            options = []
            for option in Option.objects.filter(topic=topic):
                try:
                    item_option = ItemOption.objects.get(item=self, option=option)
                    options.append({'title': option.title, 'value': item_option.value})
                except ItemOption.DoesNotExist:
                    options.append({'title': option.title, 'value': None})
            topics.append({'name': topic.name, 'options': options})
        return topics


class Topic(models.Model):
    name = models.CharField(max_length=255)


class Option(models.Model):
    topic = models.ForeignKey(Topic)
    title = models.CharField(max_length=255)


class ItemOption(models.Model):
    item = models.ForeignKey(Item)
    option = models.ForeignKey(Option)
    value = models.CharField(max_length=20)