Не могу удалить товары из корзины. Please help. Exception Value: local variable 'product' referenced before assignment

views.py

from django.shortcuts import render, HttpResponseRedirect, get_object_or_404
from django.urls import reverse

from .models import Cart, CartItem
from web.models import Product


def view(request):
    try:
        the_id = request.session['cart_id']
    except:
        the_id = None
    if the_id:
        cart = Cart.objects.get(id=the_id)
        context = {'cart': cart}
    else:
        empty_message = "Ваша корзина пуста"
        context = {"empty": True,
                   'empty_message': empty_message, }
    return render(request, 'view.html', context)


def remove_from_cart(request, id):
    cart = Cart(request)
    product = get_object_or_404(Product, id=id)
    cart.remove(product)

    # the_id = request.session['cart_id']
    # cart = Cart.objects.get(id=the_id)
    #
    # cartitem = CartItem.objects.get(id=id)
    # cartitem.cart = None
    # cartitem.save()
    return HttpResponseRedirect(reverse("cart"))


def add_to_cart(request, slug):
    request.session.set_expiry(100000)

    try:
        qty = request.GET.get('qty')
        update_qty = True
    except:
        qty = None
        update_qty = False

    try:
        the_id = request.session['cart_id']
    except:
        new_cart = Cart()
        new_cart.save()
        request.session['cart_id'] = new_cart.id
        the_id = new_cart.id

    cart = Cart.objects.get(id=the_id)

    try:
        product = Product.objects.get(slug=slug)
    except Product.DoesNotExist:
        pass
    except:
        pass

    cart_item, update= CartItem.objects.get_or_create(cart=cart, product=product)
    if update_qty and qty:
        if int(qty) == 0:
            cart_item.delete()
        else:
            cart_item.quantity = qty
            cart_item.save()
    else:
        pass

    new_total = 0.00
    for item in cart.cartitem_set.all():
        line_total = float(item.product.price) * item.quantity
        cart.line_total = line_total
        new_total += line_total

    request.session['items_total'] = cart.cartitem_set.count()
    cart.total = new_total
    cart.save()

    return HttpResponseRedirect(reverse("cart"))