def change_ost(request):
    a = [['123',44,5],['234',99,9],['345',18,67]] # a-в будущем огромный список на тысячу позиций
    all_goods = Good.objects.all()
    for good in all_goods:
        good.count = 0
        good.price = 0
        for b in a:
            if b[0] == good.barcode:
                good.count = b[1]
                good.price = b[2]
        good.save()
    return message("Test ok")