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W1Lab5 #700

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138 changes: 137 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 +72,142 @@
"\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": "c91de722-db15-44e1-9bc5-b85b1fad9d24",
"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 whole number.\")\n",
" return inventory\n",
"\n",
"\n",
"def get_customer_orders(inventory):\n",
" # Get valid number of orders\n",
" valid_num = False\n",
" while not valid_num:\n",
" try:\n",
" num_orders = int(input(\"Enter the number of customer orders: \"))\n",
" if num_orders >= 0:\n",
" valid_num = True\n",
" else:\n",
" print(\"Number of orders cannot be negative.\")\n",
" except ValueError:\n",
" print(\"Invalid input! Please enter a whole number.\")\n",
"\n",
" customer_orders = set()\n",
"\n",
" # Get valid product names\n",
" for _ in range(num_orders):\n",
" valid_product = False\n",
" while not valid_product:\n",
" product = input(\"Enter the name of a product that a customer wants to order: \").lower().strip()\n",
" \n",
" if product not in inventory:\n",
" print(f\"Error: '{product}' is not in the inventory. Please enter a valid product.\")\n",
" elif inventory[product] <= 0:\n",
" print(f\"Error: '{product}' is out of stock. Please select another product.\")\n",
" else:\n",
" customer_orders.add(product)\n",
" valid_product = True\n",
"\n",
" return customer_orders\n",
"\n",
"\n",
"def calculate_order_statistics(customer_orders, products):\n",
" total_ordered = len(customer_orders)\n",
" percentage_unique = (total_ordered / len(products)) * 100\n",
" return total_ordered, percentage_unique\n",
"\n",
"\n",
"def print_order_statistics(order_statistics):\n",
" total_ordered, percentage_unique = order_statistics\n",
" print(\"\\nOrder Statistics:\")\n",
" print(f\"Total Products Ordered: {total_ordered}\")\n",
" print(f\"Percentage of Unique Products Ordered: {percentage_unique:.1f}%\")\n",
"\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" # Step 1: Subtract 1 for ordered items\n",
" updated = {\n",
" product: quantity - 1 if product in customer_orders else quantity\n",
" for product, quantity in inventory.items()\n",
" }\n",
" # Step 2: Keep only items with stock remaining\n",
" return {\n",
" product: quantity \n",
" for product, quantity in updated.items() \n",
" if quantity > 0\n",
" }\n",
"\n",
"\n",
"def print_updated_inventory(inventory):\n",
" print(\"\\nUpdated Inventory:\")\n",
" for product, quantity in inventory.items():\n",
" print(f\"{product}: {quantity}\")\n",
"\n",
"\n",
"def calculate_total_price(customer_orders):\n",
" total_price = 0.0\n",
" for product in customer_orders:\n",
" valid_price = False\n",
" while not valid_price:\n",
" try:\n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
" if price >= 0:\n",
" total_price += price\n",
" valid_price = True\n",
" else:\n",
" print(\"Price cannot be negative. Please enter a valid price.\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a numeric value.\")\n",
" return total_price\n",
"\n",
"\n",
"# Main Program Execution\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"# 1. Initialize inventory with input validation\n",
"inventory = initialize_inventory(products)\n",
"\n",
"# 2. Get customer orders with validation against inventory & stock\n",
"customer_orders = get_customer_orders(inventory)\n",
"\n",
"# 3. Calculate and display order statistics\n",
"order_stats = calculate_order_statistics(customer_orders, products)\n",
"print_order_statistics(order_stats)\n",
"\n",
"# 4. Update and display inventory\n",
"inventory = update_inventory(customer_orders, inventory)\n",
"print_updated_inventory(inventory)\n",
"\n",
"# 5. Calculate and display total order price with input validation\n",
"total_price = calculate_total_price(customer_orders)\n",
"print(f\"\\nTotal Price: {total_price:.2f}\")"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "bca185b3-a844-4816-9a9c-0aacb30b256a",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
Expand All @@ -90,7 +226,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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