From 1740cbf53617f3368215c07c0d77e2a03f9dfd42 Mon Sep 17 00:00:00 2001
From: bperezlovisolo <b.perezlovisolo@gmail.com>
Date: Thu, 15 Jan 2026 18:11:51 +0100
Subject: [PATCH] lab-python-error-hand

---
 lab-python-error-handling.ipynb | 181 +++++++++++++++++++++++++++++++-
 1 file changed, 179 insertions(+), 2 deletions(-)

diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..0da651b 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,188 @@
     "\n",
     "4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism works as expected.\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 108,
+   "id": "9ce21ae0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 109,
+   "id": "f1432c59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity >= 0:\n",
+    "                    inventory[product] = quantity\n",
+    "                    valid_input = True\n",
+    "                else:\n",
+    "                    print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid quantity.\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 110,
+   "id": "bc38abad",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = initialize_inventory(products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 111,
+   "id": "c2a55262",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 1, 'mug': 2, 'hat': 3, 'book': 4, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 118,
+   "id": "30c2176c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    \n",
+    "    total_price = []\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "        while not valid_price:\n",
+    "            try: \n",
+    "                product = int((input(\"Enter the price of the product: \")))\n",
+    "                if product >= 0:\n",
+    "                    total_price.append(product)\n",
+    "                    valid_price = True\n",
+    "                else:\n",
+    "                    print(\"Price cannot be negative. Please enter a valid price.\")\n",
+    "                    product = 0\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid number.\")\n",
+    "    return sum(total_price)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 119,
+   "id": "21e284c4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The total number of products ordered is: 35\n"
+     ]
+    }
+   ],
+   "source": [
+    "total = calculate_total_price(customer_orders)\n",
+    "print(f\"The total number of products ordered is: {total}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 114,
+   "id": "42d4c06e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"How many products do you want to order? \"))\n",
+    "            if num_orders > 0:\n",
+    "                break\n",
+    "            else:\n",
+    "                print(\"Order quantity must be greater than zero.\")\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter a number.\")\n",
+    "    for i in range(num_orders):\n",
+    "        while True:\n",
+    "            product = input(\"Which product do you want to order? \")\n",
+    "\n",
+    "            if product not in inventory:\n",
+    "                print(\"That product does not exist. Try again.\")\n",
+    "            elif inventory[product] == 0:\n",
+    "                print(\"Sorry, that product is out of stock.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                break\n",
+    "            \n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 115,
+   "id": "1f13ab37",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "That product does not exist. Try again.\n"
+     ]
+    }
+   ],
+   "source": [
+    "customer_orders = get_customer_orders(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 116,
+   "id": "c0ec48dc",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'hat', 't-shirt', 'keychain', 'mug', 'book'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(customer_orders)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +267,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.2"
   }
  },
  "nbformat": 4,