completed error handling lab

lab-python-error-handling.ipynb

@@ -72,11 +72,150 @@
     "\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": null,
+   "id": "ebabdc77",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Exercise: Error Handling for Managing Customer Orders\n",
+    "#  Def function for initializing the inventory with error handling\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products:\n",
+    "        valid_quantity = False\n",
+    "\n",
+    "        while not valid_quantity:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "\n",
+    "                if quantity < 0:\n",
+    "                    print(\"Error: Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "                else:\n",
+    "                    inventory[product] = quantity\n",
+    "                    valid_quantity = True\n",
+    "\n",
+    "            except ValueError:\n",
+    "                print(\"Error: Invalid input. Please enter a valid quantity.\")\n",
+    "\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "4c48d1e0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Calculate total price with error handling\n",
+    "\n",
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "\n",
+    "                if price < 0:\n",
+    "                    print(\"Error: Invalid price! Please enter a non-negative value.\")\n",
+    "                else:\n",
+    "                    total_price += price\n",
+    "                    valid_price = True\n",
+    "\n",
+    "            except ValueError:\n",
+    "                print(\"Error: Invalid input. Please enter a numeric value.\")\n",
+    "\n",
+    "    return total_price"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9686b539",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#  Modify the get_customer_orders function to include error handling\n",
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    valid_number = False\n",
+    "    while not valid_number:\n",
+    "        try:\n",
+    "            number_of_orders = int(input(\"Enter the number of customer orders: \"))\n",
+    "\n",
+    "            if number_of_orders < 0:\n",
+    "                print(\"Error: Number of orders cannot be negative.\")\n",
+    "            else:\n",
+    "                valid_number = True\n",
+    "\n",
+    "        except ValueError:\n",
+    "            print(\"Error: Invalid input. Please enter a whole number.\")\n",
+    "\n",
+    "    for i in range(number_of_orders):\n",
+    "        valid_product = False\n",
+    "\n",
+    "        while not valid_product:\n",
+    "            product = input(f\"Enter product {i+1}: \").strip().lower()\n",
+    "\n",
+    "            if product not in inventory:\n",
+    "                print(f\"Error: '{product}' is not in the inventory.\")\n",
+    "            elif inventory[product] <= 0:\n",
+    "                print(f\"Error: '{product}' is out of stock.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                inventory[product] -= 1\n",
+    "                valid_product = True\n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "85a56ef4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Error: Invalid input. Please enter a valid quantity.\n",
+      "Error: Quantity cannot be negative. Please enter a valid quantity.\n",
+      "Error: Invalid input. Please enter a valid quantity.\n",
+      "Error: 'bokk' is not in the inventory.\n",
+      "Error: Invalid price! Please enter a non-negative value.\n",
+      "Inventory: {'t-shirt': 66, 'mug': 64, 'hat': 87, 'book': 99, 'keychain': 77}\n",
+      "Customer Orders: {'hat', 'mug', 'book', 'keychain'}\n",
+      "Total Price: 102.65\n"
+     ]
+    }
+   ],
+   "source": [
+    "#  Test the program with invalid inputs\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "customer_orders = get_customer_orders(inventory)\n",
+    "total_price = calculate_total_price(customer_orders)\n",
+    "\n",
+    "print(\"Inventory:\", inventory)\n",
+    "print(\"Customer Orders:\", customer_orders)\n",
+    "print(\"Total Price:\", total_price)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +229,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,