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Finished #307

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132 changes: 130 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 +72,139 @@
"\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": "18803f39",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Inventory initialized: {'apple': 3, 'banana': 5, 'cherry': 2}\n",
"Total price of products: $51.00\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Insufficient stock for apple. Only 3 available.\n",
"Error: Insufficient stock for apple. Only 3 available.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n",
"Error: Product not found in inventory. Please enter a valid product.\n"
]
}
],
"source": [
"# Step 1: Define the function for initializing the inventory with error handling\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(\"Invalid quantity! Please enter a non-negative value.\")\n",
" inventory[product] = quantity\n",
" valid_quantity = True # Exit the loop once valid input is given\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" return inventory\n",
"\n",
"# Step 2: Modify the calculate_total_price function to include error handling\n",
"def calculate_total_price(products, inventory):\n",
" total_price = 0\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 {product}s: \"))\n",
" if price < 0:\n",
" raise ValueError(\"Invalid price! Please enter a non-negative value.\")\n",
" total_price += price * inventory.get(product, 0)\n",
" valid_price = True # Exit the loop once valid price is given\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" return total_price\n",
"\n",
"# Step 3: Modify the get_customer_orders function to include error handling\n",
"def get_customer_orders(inventory):\n",
" orders = []\n",
" valid_order_count = False\n",
" while not valid_order_count:\n",
" try:\n",
" num_orders = int(input(\"Enter the number of orders: \"))\n",
" if num_orders < 0:\n",
" raise ValueError(\"Number of orders cannot be negative!\")\n",
" valid_order_count = True # Exit the loop once valid order count is entered\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" for _ in range(num_orders):\n",
" valid_product = False\n",
" while not valid_product:\n",
" product = input(\"Enter the product name: \")\n",
" if product not in inventory:\n",
" print(\"Error: Product not found in inventory. Please enter a valid product.\")\n",
" elif inventory[product] <= 0:\n",
" print(f\"Error: {product} is out of stock. Please choose another product.\")\n",
" else:\n",
" valid_quantity = False\n",
" while not valid_quantity:\n",
" try:\n",
" quantity = int(input(f\"Enter the quantity of {product}s to order: \"))\n",
" if quantity <= 0:\n",
" raise ValueError(\"Quantity must be a positive integer!\")\n",
" if quantity > inventory[product]:\n",
" raise ValueError(f\"Insufficient stock for {product}. Only {inventory[product]} available.\")\n",
" inventory[product] -= quantity # Reduce stock after successful order\n",
" orders.append((product, quantity))\n",
" valid_quantity = True # Exit the loop once valid quantity is entered\n",
" valid_product = True # Exit the loop once valid product is chosen\n",
" return orders\n",
"\n",
"# Example usage of the functions:\n",
"products = ['apple', 'banana', 'cherry']\n",
"inventory = initialize_inventory(products)\n",
"print(\"Inventory initialized:\", inventory)\n",
"\n",
"# Assuming prices are set for each product\n",
"total_price = calculate_total_price(products, inventory)\n",
"print(f\"Total price of products: ${total_price:.2f}\")\n",
"\n",
"# Get customer orders\n",
"orders = get_customer_orders(inventory)\n",
"print(\"Customer orders:\", orders)\n"
]
}
],
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"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +218,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.12.3"
}
},
"nbformat": 4,
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