solved

lab-python-error-handling.ipynb

@@ -41,18 +41,197 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Initial inventory: {'t-shirt': 5, 'mug': 55, 'hat': 5, 'book': 5, 'keychain': 5}\n",
+      "Please answer with 'yes' or 'no'.\n",
+      "\n",
+      "Customer Orders: {'mug'}\n",
+      "\n",
+      "Total different products ordered: 1\n",
+      "Percentage of products ordered: 20.00%\n",
+      "Updated Inventory:\n",
+      "t-shirt: 5\n",
+      "mug: 54\n",
+      "hat: 5\n",
+      "book: 5\n",
+      "keychain: 5\n",
+      "\n",
+      "Program finished. Thank you for using the system.\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "#incluir error handling en las funciones\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    \"\"\"\n",
+    "    Pide al usuario el stock inicial de cada producto.\n",
+    "    Maneja errores de conversión y valores negativos.\n",
+    "    \"\"\"\n",
+    "    if not isinstance(products, (list, tuple, set)):\n",
+    "        raise TypeError(\"The products parameter must be a list, tuple or set.\")\n",
+    "\n",
+    "    if not products:\n",
+    "        raise ValueError(\"Product list cannot be empty.\")\n",
+    "\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                quantity_str = input(f\"Enter the initial stock quantity for {product}: \")\n",
+    "                quantity = int(quantity_str)\n",
+    "\n",
+    "                if quantity < 0:\n",
+    "                    # No es un error de Python, pero lógicamente es inválido\n",
+    "                    raise ValueError(\"Quantity cannot be negative.\")\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Invalid input for {product}: {e}. Please enter a non-negative integer.\")\n",
+    "            else:\n",
+    "                # Solo entra aquí si no ha habido excepción\n",
+    "                inventory[product] = quantity\n",
+    "                break\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def get_customer_orders(products):\n",
+    "    \"\"\"\n",
+    "    Recoge los pedidos del cliente. Solo se aceptan productos válidos.\n",
+    "    \"\"\"\n",
+    "    customer_order = set()\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            order = input(\n",
+    "                \"Enter a product to order (t-shirt, mug, hat, book, keychain): \"\n",
+    "            ).strip().lower()\n",
+    "\n",
+    "            if not order:\n",
+    "                raise ValueError(\"Empty input is not allowed.\")\n",
+    "\n",
+    "            if order not in products:\n",
+    "                # Forzamos error para tratarlo en el except\n",
+    "                raise ValueError(f\"'{order}' is not a valid product.\")\n",
+    "        except ValueError as e:\n",
+    "            print(f\"Error: {e}\")\n",
+    "        else:\n",
+    "            customer_order.add(order)\n",
+    "\n",
+    "        # Preguntar si quiere seguir pidiendo\n",
+    "        while True:\n",
+    "            more = input(\"Do you want to order another product? (yes/no): \").strip().lower()\n",
+    "            if more == \"yes\":\n",
+    "                break\n",
+    "            elif more == \"no\":\n",
+    "                return customer_order\n",
+    "            else:\n",
+    "                print(\"Please answer with 'yes' or 'no'.\")\n",
+    "\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    \"\"\"\n",
+    "    Actualiza el inventario restando 1 por cada producto pedido.\n",
+    "    Usa raise para casos lógicos incorrectos pero los gestiona internamente.\n",
+    "    \"\"\"\n",
+    "    if not isinstance(inventory, dict):\n",
+    "        raise TypeError(\"Inventory must be a dictionary.\")\n",
+    "\n",
+    "    for order in customer_orders:\n",
+    "        try:\n",
+    "            if order not in inventory:\n",
+    "                # Error lógico: se pide algo que no existe en el inventario\n",
+    "                raise KeyError(f\"{order} is not present in the inventory.\")\n",
+    "\n",
+    "            if inventory[order] <= 0:\n",
+    "                # Sin stock\n",
+    "                raise ValueError(f\"Sorry, {order} is out of stock.\")\n",
+    "        except KeyError as e:\n",
+    "            print(f\"Inventory error: {e}\")\n",
+    "        except ValueError as e:\n",
+    "            print(e)\n",
+    "        else:\n",
+    "            # Solo si no hubo excepción\n",
+    "            inventory[order] -= 1\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    \"\"\"\n",
+    "    Calcula:\n",
+    "    - nº de productos distintos pedidos\n",
+    "    - % de productos del catálogo que se han pedido al menos una vez\n",
+    "    \"\"\"\n",
+    "    if not isinstance(products, (list, tuple, set)) or len(products) == 0:\n",
+    "        raise ValueError(\"Product list must be a non-empty list/tuple/set.\")\n",
+    "\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percent_ordered = (total_products_ordered / len(products)) * 100\n",
+    "\n",
+    "    order_statistics = (total_products_ordered, percent_ordered)\n",
+    "    return order_statistics\n",
+    "\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    total_products_ordered, percent_ordered = order_statistics\n",
+    "    print(f\"Total different products ordered: {total_products_ordered}\")\n",
+    "    print(f\"Percentage of products ordered: {percent_ordered:.2f}%\")\n",
+    "\n",
+    "\n",
+    "def print_update_inventory(inventory):\n",
+    "    print(\"Updated Inventory:\")\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"{product}: {quantity}\")\n",
+    "\n",
+    "\n",
+    "def main():\n",
+    "    try:\n",
+    "        # 1) Inicializar inventario\n",
+    "        inventory = initialize_inventory(products)\n",
+    "        print(\"\\nInitial inventory:\", inventory)\n",
+    "\n",
+    "        # 2) Obtener pedidos de cliente\n",
+    "        customer_order = get_customer_orders(products)\n",
+    "        print(\"\\nCustomer Orders:\", customer_order)\n",
+    "\n",
+    "        # 3) Actualizar inventario\n",
+    "        inventory = update_inventory(customer_order, inventory)\n",
+    "\n",
+    "        # 4) Calcular estadísticas del pedido\n",
+    "        order_stats = calculate_order_statistics(customer_order, products)\n",
+    "\n",
+    "    except Exception as e:\n",
+    "        # Captura de cualquier excepción inesperada\n",
+    "        print(f\"\\nAn unexpected error occurred: {e}\")\n",
+    "    else:\n",
+    "        # Solo se ejecuta si no hubo excepciones en el try\n",
+    "        print()\n",
+    "        print_order_statistics(order_stats)\n",
+    "        print_update_inventory(inventory)\n",
+    "    finally:\n",
+    "        # Siempre se ejecuta\n",
+    "        print(\"\\nProgram finished. Thank you for using the system.\")\n",
+    "\n",
+    "\n",
+    "if __name__ == \"__main__\":\n",
+    "    main()\n",
+    "\n",
+    "\n"
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -66,7 +245,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.9"
   }
  },
  "nbformat": 4,