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Solved Laboratory #513

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149 changes: 147 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 +72,156 @@
"\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": "2bc83271",
"metadata": {},
"outputs": [],
"source": [
"#1\n",
"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 quantity.\")\n",
" return inventory\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "ae145bc2",
"metadata": {},
"outputs": [],
"source": [
"#2. 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",
"\n",
"def calculate_total_price(products):\n",
" prices = {}\n",
" for product in products:\n",
" valid_price = False\n",
" while not valid_price:\n",
" try:\n",
" price = float(input(f\"Enter the price of one {product}: \"))\n",
" if price >= 0:\n",
" prices[product] = 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 number.\")\n",
" return prices\n",
"\n",
"\n",
" "
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4d789222",
"metadata": {},
"outputs": [],
"source": [
"#3. Modify the `get_customer_orders` function to include error handling.\n",
"# - If the user enters an invalid number of orders (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the number of orders.\n",
"# - If the user enters an invalid product name (e.g., a product name that is not in the inventory), or that doesn't have stock available, display an error message and ask them to re-enter the product name. *Hint: you will need to pass inventory as a parameter*\n",
"# - Use a try-except block to handle the error and continue prompting the user until a valid product name is entered.\n",
"\n",
"def get_customer_orders(inventory):\n",
" orders = {}\n",
"\n",
" # Get number of orders\n",
" while True:\n",
" try:\n",
" num_orders = int(input(\"How many products would you like to order? \"))\n",
" if num_orders > 0:\n",
" break\n",
" else:\n",
" print(\"Please enter a positive number of orders.\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a number.\")\n",
"\n",
" # Get each order\n",
" for i in range(num_orders):\n",
" while True:\n",
" product = input(f\"Enter the name of product #{i+1}: \").strip().lower()\n",
" if product in inventory:\n",
" if inventory[product] > 0:\n",
" break\n",
" else:\n",
" print(f\"Sorry, {product} is out of stock. Choose another product.\")\n",
" else:\n",
" print(\"Invalid product name. Please choose from the available inventory.\")\n",
"\n",
" while True:\n",
" try:\n",
" quantity = int(input(f\"Enter the quantity of {product} you want to order: \"))\n",
" if 0 < quantity <= inventory[product]:\n",
" orders[product] = quantity\n",
" inventory[product] -= quantity\n",
" break\n",
" elif quantity <= 0:\n",
" print(\"Quantity must be greater than 0.\")\n",
" else:\n",
" print(f\"Only {inventory[product]} {product}(s) available.\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a number.\")\n",
" \n",
" return orders\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "9f93144d",
"metadata": {},
"outputs": [],
"source": [
"#4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism \n",
"# works as expected.\n",
"\n",
"def main():\n",
" products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
" inventory = initialize_inventory(products)\n",
" customer_orders = get_customer_orders(inventory)\n",
"\n",
" print(\"\\nOrder Statistics:\")\n",
" print(f\"Total Products Ordered: {len(customer_orders)}\")\n",
" percentage = (len(customer_orders) / len(inventory)) * 100\n",
" print(f\"Percentage of Unique Products Ordered: {percentage:.1f}%\")\n",
"\n",
" print(\"\\nUpdated Inventory:\")\n",
" for product, qty in inventory.items():\n",
" print(f\"{product}: {qty}\")\n",
"\n",
" prices = calculate_total_price(customer_orders)\n",
" print(f\"\\nPrices entered: {prices}\")\n",
"\n",
"\n",
"# Run the program\n",
"if __name__ == \"__main__\":\n",
" main()"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +235,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.12.9"
}
},
"nbformat": 4,
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