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Complete error handling lab #701

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311 changes: 310 additions & 1 deletion lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,315 @@
"\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": 9,
"id": "1e7d0648-36ec-40fc-b872-5f9987035378",
"metadata": {},
"outputs": [],
"source": [
"def initialize_inventory(products):\n",
" inventory = {}\n",
" for product in products:\n",
" valid_quantity = False\n",
" while not valid_quantity:\n",
" try:\n",
" quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
" if quantity < 0:\n",
" raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n",
" valid_quantity = True\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" inventory[product] = quantity\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 10,
"id": "8914fb53-1de4-402d-8ecd-cd054f6ee66e",
"metadata": {},
"outputs": [],
"source": [
"def get_customer_orders(inventory):\n",
" number_of_orders = 0\n",
" valid_number = False\n",
" while not valid_number:\n",
" try:\n",
" number_of_orders = int(input(\"How many products does the customer want to order? \"))\n",
" if number_of_orders < 0:\n",
" print(\"Error: number of orders cannot be negative.\")\n",
" else:\n",
" valid_number = True\n",
" except ValueError:\n",
" print(\"Error: please enter a valid number.\")\n",
" customer_orders = set()\n",
" for _ in range(number_of_orders):\n",
" valid_product = False\n",
" while not valid_product:\n",
" try:\n",
" item = input(\"Enter the name of a product that a customer wants to order: \").lower()\n",
" if item not in inventory:\n",
" print(\"Error: product is not in the inventory.\")\n",
" elif inventory[item] <= 0:\n",
" print(\"Error: product is out of stock.\")\n",
" else:\n",
" customer_orders.add(item)\n",
" valid_product = True\n",
" except ValueError:\n",
" print(\"Error: invalid product.\")\n",
" return customer_orders"
]
},
{
"cell_type": "code",
"execution_count": 11,
"id": "0f8faefc-d716-41ec-9eb9-d9763b87c192",
"metadata": {},
"outputs": [],
"source": [
"def update_inventory(customer_orders, inventory):\n",
" inventory = {item: inventory[item] - 1 if item in customer_orders else inventory[item]for item in inventory}\n",
" inventory = {item: quantity for item, quantity in inventory.items() if quantity > 0}\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 12,
"id": "f870ff34-1824-4447-a8e2-07ba965279ac",
"metadata": {},
"outputs": [],
"source": [
"def calculate_order_statistics(customer_orders, products):\n",
" total_products_ordered = len(customer_orders)\n",
" percentage_products_ordered = (total_products_ordered / len(products)) * 100\n",
" return total_products_ordered, percentage_products_ordered"
]
},
{
"cell_type": "code",
"execution_count": 13,
"id": "36e4dcb9-0282-4e31-8693-f88dbea98829",
"metadata": {},
"outputs": [],
"source": [
"def print_order_statistics(order_statistics):\n",
" total_products_ordered, percentage_products_ordered = order_statistics\n",
" labels = [\"Total Products Ordered:\", \"Percentage of Products Ordered:\"]\n",
" print()\n",
" print(\"Order Statistics:\")\n",
" for label, value in zip(labels, order_statistics):\n",
" print(label, value)"
]
},
{
"cell_type": "code",
"execution_count": 14,
"id": "570cb1c5-88dd-4de4-90b3-6f573788ba81",
"metadata": {},
"outputs": [],
"source": [
"def print_updated_inventory(inventory):\n",
" updated_inventory = {item.title(): quantity for item, quantity in inventory.items()}\n",
" print()\n",
" print(\"Updated Inventory:\")\n",
" for item, quantity in updated_inventory.items():\n",
" print(item + \":\", quantity)"
]
},
{
"cell_type": "code",
"execution_count": 15,
"id": "281e47b4-9e78-4b43-a378-8cbd766e2ae2",
"metadata": {},
"outputs": [],
"source": [
"def calculate_total_price(customer_orders):\n",
" prices = []\n",
" for item in customer_orders:\n",
" valid_price = False\n",
" while not valid_price:\n",
" try:\n",
" price = float(input(f\"Enter the price of {item}: \"))\n",
" if price < 0:\n",
" print(\"Error: price cannot be negative.\")\n",
" else:\n",
" prices.append(price)\n",
" valid_price = True\n",
" except ValueError:\n",
" print(\"Error: please enter a valid number.\")\n",
" total_price = sum(prices)\n",
" print(\"Total Price:\", total_price)"
]
},
{
"cell_type": "code",
"execution_count": 18,
"id": "de4f1d02-2c30-4efe-b361-5b399b5ed5c7",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: w\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: invalid literal for int() with base 10: 'w'\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: -4\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Invalid quantity! Please enter a non-negative value.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: 4\n",
"Enter the quantity of mugs available: 3\n",
"Enter the quantity of hats available: 2\n",
"Enter the quantity of books available: 1\n",
"Enter the quantity of keychains available: 0\n",
"How many products does the customer want to order? w\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: please enter a valid number.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"How many products does the customer want to order? -5\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: number of orders cannot be negative.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"How many products does the customer want to order? 3\n",
"Enter the name of a product that a customer wants to order: keychain\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: product is out of stock.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of a product that a customer wants to order: book\n",
"Enter the name of a product that a customer wants to order: book\n",
"Enter the name of a product that a customer wants to order: book\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"Order Statistics:\n",
"Total Products Ordered: 1\n",
"Percentage of Products Ordered: 20.0\n",
"\n",
"Updated Inventory:\n",
"T-Shirt: 4\n",
"Mug: 3\n",
"Hat: 2\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of book: -5\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: price cannot be negative.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of book: w\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: please enter a valid number.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of book: 10\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Total Price: 10.0\n"
]
}
],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"inventory = initialize_inventory(products)\n",
"\n",
"customer_orders = get_customer_orders(inventory)\n",
"\n",
"order_statistics = calculate_order_statistics(customer_orders, products)\n",
"\n",
"print_order_statistics(order_statistics)\n",
"\n",
"inventory = update_inventory(customer_orders, inventory)\n",
"\n",
"print_updated_inventory(inventory)\n",
"\n",
"calculate_total_price(customer_orders)"
]
}
],
"metadata": {
Expand All @@ -90,7 +399,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.14.6"
}
},
"nbformat": 4,
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