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Solved lab #46

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206 changes: 202 additions & 4 deletions lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -41,18 +41,216 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
"metadata": {},
"outputs": [],
"source": [
"# your code goes here"
"#Define a list\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"#1.Define a function named initialize_inventory that takes products as a parameter, \n",
"# #Implement the code for initializing an inventory dictionary using a loop and user input and \n",
"# apply error handling techniques to each function using try-except blocks.\n",
"\n",
"def initialize_inventory(products):\n",
"\tinventory = {}\n",
"\tfor product in products:\n",
"\t\twhile True:\n",
"\t\t\ttry:\n",
"\t\t\t\tqty = int(input(f\"Enter initial quantity for {product}: \"))\n",
"\t\t\t\tif qty < 0:\n",
"\t\t\t\t\traise ValueError(\"Quantity cannot be negative.\")\n",
"\t\t\t\tinventory[product] = qty\n",
"\t\t\t\tbreak\n",
"\t\t\texcept ValueError as e:\n",
"\t\t\t\tprint(f\"Invalid input: {e}. Please enter a non-negative integer.\")\n",
"\treturn inventory\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "e0024e66",
"metadata": {},
"outputs": [],
"source": [
"def get_customer_orders():\n",
" # Implement the code for prompting the user to enter the products names using a loop\n",
" # apply error handling techniques to each function using try-except blocks.\n",
" orders = []\n",
" print(\"Enter product names one by one. Type 'done' to finish.\")\n",
" while True:\n",
" try:\n",
" product = input(\"Enter product name: \").strip()\n",
" if product.lower() == 'done':\n",
" break\n",
" if product not in products:\n",
" raise ValueError(f\"'{product}' is not a valid product.\")\n",
" orders.append(product)\n",
" except ValueError as e:\n",
" print(f\"Error: {e}\")\n",
" return orders"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "7c6c2a73",
"metadata": {},
"outputs": [],
"source": [
"#Define a function named update_inventory that takes customer_orders and inventory as parameters\n",
"# apply error handling techniques to each function using try-except blocks.\n",
"def update_inventory(customer_orders, inventory):\n",
"\tfor product in customer_orders:\n",
"\t\ttry:\n",
"\t\t\tif product not in inventory:\n",
"\t\t\t\traise KeyError(f\"Product '{product}' not found in inventory.\")\n",
"\t\t\tif inventory[product] <= 0:\n",
"\t\t\t\traise ValueError(f\"Product '{product}' is out of stock.\")\n",
"\t\t\tinventory[product] -= 1\n",
"\t\texcept KeyError as ke:\n",
"\t\t\tprint(f\"Error: {ke}\")\n",
"\t\texcept ValueError as ve:\n",
"\t\t\tprint(f\"Error: {ve}\")\n",
"\treturn inventory"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "acd06e6a",
"metadata": {},
"outputs": [],
"source": [
"#4. Define a function named calculate_order_statistics that takes customer_orders and products as parameters.\n",
"# apply error handling techniques to each function using try-except blocks.\n",
"def calculate_order_statistics(customer_orders, products):\n",
"\ttry:\n",
"\t\tif not isinstance(customer_orders, list):\n",
"\t\t\traise TypeError(\"customer_orders must be a list.\")\n",
"\t\tif not isinstance(products, list):\n",
"\t\t\traise TypeError(\"products must be a list.\")\n",
"\t\tstats = {}\n",
"\t\tfor product in products:\n",
"\t\t\tstats[product] = customer_orders.count(product)\n",
"\t\treturn stats\n",
"\texcept Exception as e:\n",
"\t\tprint(f\"Error calculating order statistics: {e}\")\n",
"\t\treturn None"
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "d2376b48",
"metadata": {},
"outputs": [],
"source": [
"# Define a function named print_order_statistics that takes customer_orders and products as parameters\n",
"# Implement the code for printing the order statistics\n",
"# Apply error handling techniques to each function using try-except blocks.\n",
"def print_order_statistics(customer_orders, products):\n",
"\ttry:\n",
"\t\tstats = calculate_order_statistics(customer_orders, products)\n",
"\t\tif stats is None:\n",
"\t\t\traise ValueError(\"Could not calculate order statistics.\")\n",
"\t\tprint(\"Order Statistics:\")\n",
"\t\tfor product, count in stats.items():\n",
"\t\t\tprint(f\"{product}: {count}\")\n",
"\texcept Exception as e:\n",
"\t\tprint(f\"Error printing order statistics: {e}\")"
]
},
{
"cell_type": "code",
"execution_count": 7,
"id": "4403ca7c",
"metadata": {},
"outputs": [],
"source": [
"#6. Define a function named print_updated_inventory that takes inventory as a parameter\n",
"def print_updated_inventory(inventory):\n",
" #Implement the code for printing the updated inventory\n",
" # Apply error handling techniques to each function using try-except blocks.\n",
" try:\n",
" if not isinstance(inventory, dict):\n",
" raise TypeError(\"Inventory must be a dictionary.\")\n",
" print(\"Updated Inventory:\")\n",
" for product, quantity in inventory.items():\n",
" print(f\"{product}: {quantity} units\")\n",
" except Exception as e:\n",
" print(f\"Error printing updated inventory: {e}\")"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "1f0538cb",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"Welcome to the inventory management system!\n",
"\n",
"\n",
"Inventory initialized.\n",
"\n",
"Enter product names one by one. Type 'done' to finish.\n",
"Error: 'jeans' is not a valid product.\n",
"Error: 'mouse' is not a valid product.\n",
"Order Statistics:\n",
"t-shirt: 0\n",
"mug: 1\n",
"hat: 0\n",
"book: 1\n",
"keychain: 0\n",
"Updated Inventory:\n",
"t-shirt: 4 units\n",
"mug: 2 units\n",
"hat: 5 units\n",
"book: 5 units\n",
"keychain: 5 units\n",
"\n",
"Thank you for using the inventory management system!\n"
]
}
],
"source": [
"#7.Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
"# Apply error handling techniques to each function using try-except blocks.\n",
"def main():\n",
" try:\n",
" print(\"\\nWelcome to the inventory management system!\\n\")\n",
" inventory = initialize_inventory(products)\n",
" print(\"\\nInventory initialized.\\n\")\n",
"\n",
" customer_orders = get_customer_orders()\n",
" updated_inventory = update_inventory(customer_orders, inventory)\n",
" \n",
" print_order_statistics(customer_orders, products)\n",
" print_updated_inventory(updated_inventory)\n",
" \n",
" print(\"\\nThank you for using the inventory management system!\")\n",
" except Exception as e:\n",
" print(f\"An unexpected error occurred: {e}\")\n",
"\n",
"if __name__ == \"__main__\":\n",
" try:\n",
" main()\n",
" except Exception as e:\n",
" print(f\"Program terminated due to an error: {e}\")"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -66,7 +264,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.9.6"
}
},
"nbformat": 4,
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