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week 1 lab 3 done #299

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208 changes: 207 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 +72,212 @@
"\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": 15,
"id": "fda072d9-0af4-4662-94e5-d7e059fed332",
"metadata": {},
"outputs": [],
"source": [
"#Modify the calculate_total_price function to include error handling.\n",
"#If the user enters an invalid price (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the price for that product.\n",
"#Use a try-except block to handle the error and continue prompting the user until a valid price is entered.\n",
"products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"\n",
"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(\"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\n",
"\n",
"def get_customer_orders(products, inventory):\n",
" while True:\n",
" try:\n",
" num_orders = int(input(\"How many products does the customer want to order? \"))\n",
" if num_orders < 0:\n",
" raise ValueError(\"The number of orders cannot be negative.\")\n",
" break\n",
" except ValueError as e:\n",
" print(f\"Invalid input: {e}. Please enter a positive integer for the number of orders.\")\n",
"\n",
" customer_orders = set()\n",
" for i in range(num_orders):\n",
" while True:\n",
" product = input(f\"Enter the name of product #{i+1} from the following list {products}: \")\n",
" if product in products and inventory.get(product, 0) > 0:\n",
" customer_orders.add(product)\n",
" break\n",
" else:\n",
" print(\"Invalid product name. \")\n",
"\n",
" return customer_orders\n",
"\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" updated_inventory = {product: count - (1 if product in customer_orders else 0)for product, count in inventory.items()}\n",
"\n",
" updated_inventory = {product: count for product, count in updated_inventory.items() if count > 0}\n",
" \n",
" return updated_inventory\n",
"\n",
"def calculate_order_statistics(customer_orders, products):\n",
" total_products_ordered = len(customer_orders)\n",
" unique_products = set(products)\n",
" percentage = (total_products_ordered / len(unique_products)) * 100\n",
" return total_products_ordered, percentage\n",
"\n",
"def print_order_statistics(order_statistics):\n",
" total_products_ordered, percentage_ordered = order_statistics\n",
" print(\"Order Statistics:\")\n",
" print(f\"Total Products Ordered: {total_products_ordered}\")\n",
" print(f\"Percentage of Products Ordered: {percentage_ordered}%\")\n",
"\n",
"def print_updated_inventory(inventory):\n",
" print(\"Updated 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",
" while True:\n",
" try:\n",
" price = float(input(f\"Enter the price for {product}: \"))\n",
" if price < 0:\n",
" raise ValueError(\"Price cannot be negative.\")\n",
" total_price += price\n",
" break\n",
" except ValueError as e:\n",
" print(f\"Invalid input: {e}. Please enter a valid price.\")\n",
" return total_price"
]
},
{
"cell_type": "code",
"execution_count": 17,
"id": "362d27e1-7ed2-4b57-8e45-5db51df1080f",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: -5\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Please enter a non-negative value.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: 5\n",
"Enter the quantity of mugs available: 5\n",
"Enter the quantity of hats available: 5\n",
"Enter the quantity of books available: 5\n",
"Enter the quantity of keychains available: 5\n",
"How many products does the customer want to order? -10\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input: The number of orders cannot be negative.. Please enter a positive integer for the number of orders.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"How many products does the customer want to order? 2\n",
"Enter the name of product #1 from the following list ['t-shirt', 'mug', 'hat', 'book', 'keychain']: mug\n",
"Enter the name of product #2 from the following list ['t-shirt', 'mug', 'hat', 'book', 'keychain']: hat\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"Order Statistics:\n",
"Total Products Ordered: 2\n",
"Percentage of Products Ordered: 40.0%\n",
"\n",
"Updated Inventory:\n",
"t-shirt: 5\n",
"mug: 4\n",
"hat: 4\n",
"book: 5\n",
"keychain: 5\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price for mug: -3\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input: Price cannot be negative.. Please enter a valid price.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price for mug: 15\n",
"Enter the price for hat: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Total Price: 17.0\n"
]
}
],
"source": [
"inventory = initialize_inventory(products)\n",
"customer_orders = get_customer_orders(products, inventory)\n",
"print()\n",
"order_statistics = calculate_order_statistics(customer_orders, products)\n",
"print_order_statistics(order_statistics)\n",
"print()\n",
"inventory = update_inventory(customer_orders, inventory)\n",
"print_updated_inventory(inventory)\n",
"total_price = calculate_total_price(customer_orders)\n",
"print(f\"Total Price: {total_price:.1f}\")"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "cd9d40e7-d042-421a-a78c-6a387fd93b41",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
Expand All @@ -90,7 +296,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.12.7"
}
},
"nbformat": 4,
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