Anatoly Scherbakov

if not []:
   print('[] вернул False')
if [1, 2, 3]:
   print('[1, 2, 3] вернул True')

......
            else:
                i = random.randint(1, 5)
                ch, y = random.choice((('+', x + i), ('-', x - i), ('*', x * i), ('/', x / i)))
                print('Случайная величина = ', i)
                print('Результат действия = ', y)
                if input('Что это было за действие?: ') == ch:
                    print(yes)
                    count += 1
                else:
                    print(no)
                    life -= 1
                    print('Прав на ошибку - ', life)
            if count == 10:
......

# forms.py
StockroomWorkerFormSet = inlineformset_factory(Stockroom, WorkerType, extra=0, can_delete=True)
StockroomGoodsFormSet = inlineformset_factory(Stockroom, GoodsType, extra=0, can_delete=True)

# views.py
class StockroomEditView(UpdateView):
    model = Stockroom
    temlate_name = 'stock/edit.html'

    def get_success_url(self):
        return self.get_object().get_absolute_url()

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        worker_formset = self.get_form(StockroomWorkerFormSet)
        goods_formset = self.get_form(StockroomGoodsFormSet)

        return self.render_to_response(self.get_context_data(
            worker_formset=worker_formset, goods_formset=goods_formset))

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        worker_formset = self.get_form(StockroomWorkerFormSet)
        goods_formset = self.get_form(StockroomGoodsFormSet)

    if worker_formset.is_valid() and goods_formset.is_valid():
        return self._form_valid(worker_formset, goods_formset)
    else:
        return self._form_invalid(worker_formset, goods_formset)

    def _form_valid(self, worker, goods):
        worker.save()
        goods.save()
        return HttpResponseRedirect(self.get_success_url())

edit.html
    <form action="" method="post">
        {% csrf_token %}
        {{ worker_formset.management_form }}
        {{ goods_formset.management_form }}
        {% for form in worker_formset %}
            {{ form }}
        {% endfor %}
        {% for form in goods_formset %}
            {{ form }}
        {% endfor %}
    </form>