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Error Handling lab #660

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f5fc1f1
Solved lab
Orgo4ever Jun 19, 2026
d35d7c6
Update lab-python-error-handling.ipynb
Orgo4ever Jun 19, 2026
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189 changes: 187 additions & 2 deletions lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,11 +72,196 @@
"\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": 1,
"id": "c169f7e4",
"metadata": {},
"outputs": [],
"source": [
"# Cell 1: products list\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "6301ba90",
"metadata": {},
"outputs": [],
"source": [
"# Cell 2: initialize_inventory function\n",
"def initialize_inventory(products):\n",
" inventory = {}\n",
"\n",
" for product in products:\n",
" valid_input = False\n",
"\n",
" while not valid_input:\n",
" try:\n",
" quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
"\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",
"\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a whole number.\")\n",
"\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "d87d0756",
"metadata": {},
"outputs": [],
"source": [
"# Cell 3: get_customer_orders function\n",
"def get_customer_orders(inventory):\n",
" customer_orders = {}\n",
"\n",
" valid_input = False\n",
"\n",
" while not valid_input:\n",
" try:\n",
" number_of_orders = int(input(\"How many different products would the customer like to order? \"))\n",
"\n",
" if number_of_orders > 0:\n",
" valid_input = True\n",
" else:\n",
" print(\"Number of orders must be greater than zero.\")\n",
"\n",
" except ValueError:\n",
" print(\"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_order = input(\"Enter the name of a product: \").lower()\n",
"\n",
" if product_order not in inventory:\n",
" print(\"Error: That product is not in the inventory.\")\n",
"\n",
" elif inventory[product_order] <= 0:\n",
" print(\"Error: That product is out of stock.\")\n",
"\n",
" else:\n",
" valid_quantity = False\n",
"\n",
" while not valid_quantity:\n",
" try:\n",
" order_quantity = int(input(f\"Enter the quantity of {product_order} ordered: \"))\n",
"\n",
" if order_quantity <= 0:\n",
" print(\"Order quantity must be greater than zero.\")\n",
"\n",
" elif order_quantity > inventory[product_order]:\n",
" print(f\"Not enough stock. Only {inventory[product_order]} available.\")\n",
"\n",
" else:\n",
" customer_orders[product_order] = order_quantity\n",
" valid_quantity = True\n",
" valid_product = True\n",
"\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a whole number.\")\n",
"\n",
" return customer_orders"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "324c1f58",
"metadata": {},
"outputs": [],
"source": [
"# Cell 4: calculate_total_price function\n",
"def calculate_total_price(customer_orders):\n",
" total_price = 0.0\n",
"\n",
" for product, quantity in customer_orders.items():\n",
" valid_input = False\n",
"\n",
" while not valid_input:\n",
" try:\n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
"\n",
" if price >= 0:\n",
" total_price += price * quantity\n",
" valid_input = True\n",
" else:\n",
" print(\"Price cannot be negative. Please enter a valid price.\")\n",
"\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a numeric price.\")\n",
"\n",
" return total_price"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "ab01adc6",
"metadata": {},
"outputs": [],
"source": [
"# Cell 5: update_inventory function\n",
"def update_inventory(customer_orders, inventory):\n",
" for product, quantity in customer_orders.items():\n",
" inventory[product] -= quantity\n",
"\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "1f005003",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: That product is out of stock.\n",
"Error: That product is out of stock.\n",
"Error: That product is not in the inventory.\n",
"Error: That product is out of stock.\n",
"Error: That product is not in the inventory.\n"
]
}
],
"source": [
"# Cell 6: run the program\n",
"inventory = initialize_inventory(products)\n",
"customer_orders = get_customer_orders(inventory)\n",
"total_price = calculate_total_price(customer_orders)\n",
"inventory = update_inventory(customer_orders, inventory)\n",
"\n",
"print(\"Customer orders:\", customer_orders)\n",
"print(\"Total price:\", total_price)\n",
"print(\"Updated inventory:\", inventory)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "672ea904",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +275,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.9.10"
}
},
"nbformat": 4,
Expand Down