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139 changes: 137 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 +72,146 @@
"\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": 3,
"id": "bc6cf873",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"'f' is not available. Please choose from: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"'m' is not available. Please choose from: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"Total Ordered: 2\n",
"Percentagem of products ordered: 40.0\n",
"t-shirt: 10\n",
"mug: 10\n",
"hat: 9\n",
"book: 9\n",
"keychain: 10\n"
]
}
],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\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",
"\n",
"# Previous exercise:\n",
"'''\n",
"def get_customer_orders():\n",
" customer_orders = set()\n",
"\n",
" add_another = \"yes\"\n",
"\n",
" while add_another == \"yes\":\n",
" order = input(\"Please input the name of the product: \").lower().strip()\n",
" customer_orders.add(order)\n",
"\n",
" add_another = input(\"Do you want another product? (yes/no): \").lower().strip()\n",
"\n",
" return customer_orders\n",
"'''\n",
"# Now with the error handling\n",
"\n",
"def get_customer_orders():\n",
" customer_orders = set()\n",
"\n",
" add_another = \"yes\"\n",
"\n",
" while add_another == \"yes\":\n",
" try:\n",
" order = input(\"Please input the name of the product: \").lower().strip()\n",
"\n",
" if order not in products:\n",
" print(f\"'{order}' is not available. Please choose from: {products}\")\n",
" continue\n",
"\n",
" customer_orders.add(order)\n",
"\n",
" while True:\n",
" add_another = input(\"Do you want another product? (yes/no): \").lower().strip()\n",
"\n",
" if add_another in [\"yes\", \"no\"]:\n",
" break\n",
" else:\n",
" print(\"Please type 'yes' or 'no' only.\")\n",
"\n",
" except ValueError as e:\n",
" print(f\"Error: {e}\")\n",
"\n",
" return customer_orders\n",
"\n",
"\n",
"\n",
"\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" return {\n",
" product: quantity - 1 if product in customer_orders else quantity\n",
" for product, quantity in inventory.items()\n",
" }\n",
"\n",
"def calculate_order_statistics(customer_orders, products):\n",
" total_order = len(customer_orders)\n",
" rate = (total_order / len(products)) * 100\n",
"\n",
" return total_order, rate\n",
"\n",
"def print_order_statistics(order_statistics):\n",
" total_order, rate = order_statistics\n",
" \n",
" print(f\"Total Ordered: {total_order}\")\n",
" print(f\"Percentagem of products ordered: {rate}\")\n",
"\n",
"\n",
"def print_updated_inventory(inventory):\n",
" [print(f\"{product}: {quantity}\") for product, quantity in inventory.items()]\n",
"\n",
"\n",
"\n",
"inventory = initialize_inventory(products)\n",
"\n",
"customer_orders = get_customer_orders()\n",
"\n",
"inventory = update_inventory(customer_orders, inventory)\n",
"\n",
"order_statistics = calculate_order_statistics(customer_orders, products)\n",
"\n",
"print_order_statistics(order_statistics)\n",
"\n",
"print_updated_inventory(inventory)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4f74e438",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +225,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.14.5"
}
},
"nbformat": 4,
Expand Down