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Updated Solutions for Lab #588

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f650f7d
Updated Solutions for Lab
victoriacanoacha-source Feb 19, 2026
e8a89f7
Updated Solutions Lab Error Handling
victoriacanoacha-source Feb 19, 2026
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125 changes: 122 additions & 3 deletions lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,13 +72,132 @@
"\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": 26,
"id": "d7b3e227-93a6-48b9-85c6-a0a366c2e8b3",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of hat: -10\n",
"Enter the price of keychain: 9\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input. Prices cannot be negative.\n"
]
},
{
"data": {
"text/plain": [
"0"
]
},
"execution_count": 26,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"def calculate_total_price(customer_orders):\n",
" try:\n",
" prices = {product: float(input(f\"Enter the price of {product}: \")) for product in customer_orders}\n",
"\n",
" if any(price < 0 or price == str for price in prices.values()):\n",
" print(\"Invalid input. Prices cannot be negative.\")\n",
" return 0\n",
"\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter numeric values for prices.\")\n",
" return 0\n",
" else:\n",
" return sum(prices.values())\n",
" \n",
"orders = [\"hat\", \"keychain\"]\n",
"calculate_total_price(orders)\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": 73,
"id": "f8fc2ec0-04c6-469f-8455-aff10012355d",
"metadata": {},
"outputs": [
{
"ename": "KeyboardInterrupt",
"evalue": "Interrupted by user",
"output_type": "error",
"traceback": [
"\u001b[31m---------------------------------------------------------------------------\u001b[39m",
"\u001b[31mKeyboardInterrupt\u001b[39m Traceback (most recent call last)",
"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[73]\u001b[39m\u001b[32m, line 34\u001b[39m\n\u001b[32m 30\u001b[39m \u001b[38;5;28;01mreturn\u001b[39;00m customer_orders\n\u001b[32m 32\u001b[39m inventory = {\u001b[33m'\u001b[39m\u001b[33mt-shirt\u001b[39m\u001b[33m'\u001b[39m: \u001b[32m3\u001b[39m, \u001b[33m'\u001b[39m\u001b[33mmug\u001b[39m\u001b[33m'\u001b[39m: \u001b[32m0\u001b[39m, \u001b[33m'\u001b[39m\u001b[33mhat\u001b[39m\u001b[33m'\u001b[39m: \u001b[32m1\u001b[39m, \u001b[33m'\u001b[39m\u001b[33mbook\u001b[39m\u001b[33m'\u001b[39m: \u001b[32m3\u001b[39m, \u001b[33m'\u001b[39m\u001b[33mkeychain\u001b[39m\u001b[33m'\u001b[39m: \u001b[32m4\u001b[39m}\n\u001b[32m---> \u001b[39m\u001b[32m34\u001b[39m orders = \u001b[43mget_customer_orders\u001b[49m\u001b[43m(\u001b[49m\u001b[43minventory\u001b[49m\u001b[43m)\u001b[49m\n\u001b[32m 35\u001b[39m \u001b[38;5;28mprint\u001b[39m(orders)\n",
"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[73]\u001b[39m\u001b[32m, line 5\u001b[39m, in \u001b[36mget_customer_orders\u001b[39m\u001b[34m(inventory)\u001b[39m\n\u001b[32m 3\u001b[39m \u001b[38;5;28;01mwhile\u001b[39;00m \u001b[38;5;28;01mTrue\u001b[39;00m:\n\u001b[32m 4\u001b[39m \u001b[38;5;28;01mtry\u001b[39;00m:\n\u001b[32m----> \u001b[39m\u001b[32m5\u001b[39m num_orders = \u001b[38;5;28mint\u001b[39m(\u001b[38;5;28;43minput\u001b[39;49m\u001b[43m(\u001b[49m\u001b[33;43m\"\u001b[39;49m\u001b[33;43mEnter the number of customer orders: \u001b[39;49m\u001b[33;43m\"\u001b[39;49m\u001b[43m)\u001b[49m)\n\u001b[32m 6\u001b[39m \u001b[38;5;28;01mif\u001b[39;00m num_orders < \u001b[32m0\u001b[39m:\n\u001b[32m 7\u001b[39m \u001b[38;5;28mprint\u001b[39m(\u001b[33m\"\u001b[39m\u001b[33mInvalid input: number must be positive.\u001b[39m\u001b[33m\"\u001b[39m)\n",
"\u001b[36mFile \u001b[39m\u001b[32m/opt/anaconda3/lib/python3.13/site-packages/ipykernel/kernelbase.py:1275\u001b[39m, in \u001b[36mKernel.raw_input\u001b[39m\u001b[34m(self, prompt)\u001b[39m\n\u001b[32m 1273\u001b[39m msg = \u001b[33m\"\u001b[39m\u001b[33mraw_input was called, but this frontend does not support input requests.\u001b[39m\u001b[33m\"\u001b[39m\n\u001b[32m 1274\u001b[39m \u001b[38;5;28;01mraise\u001b[39;00m StdinNotImplementedError(msg)\n\u001b[32m-> \u001b[39m\u001b[32m1275\u001b[39m \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28;43mself\u001b[39;49m\u001b[43m.\u001b[49m\u001b[43m_input_request\u001b[49m\u001b[43m(\u001b[49m\n\u001b[32m 1276\u001b[39m \u001b[43m \u001b[49m\u001b[38;5;28;43mstr\u001b[39;49m\u001b[43m(\u001b[49m\u001b[43mprompt\u001b[49m\u001b[43m)\u001b[49m\u001b[43m,\u001b[49m\n\u001b[32m 1277\u001b[39m \u001b[43m \u001b[49m\u001b[38;5;28;43mself\u001b[39;49m\u001b[43m.\u001b[49m\u001b[43m_parent_ident\u001b[49m\u001b[43m[\u001b[49m\u001b[33;43m\"\u001b[39;49m\u001b[33;43mshell\u001b[39;49m\u001b[33;43m\"\u001b[39;49m\u001b[43m]\u001b[49m\u001b[43m,\u001b[49m\n\u001b[32m 1278\u001b[39m \u001b[43m \u001b[49m\u001b[38;5;28;43mself\u001b[39;49m\u001b[43m.\u001b[49m\u001b[43mget_parent\u001b[49m\u001b[43m(\u001b[49m\u001b[33;43m\"\u001b[39;49m\u001b[33;43mshell\u001b[39;49m\u001b[33;43m\"\u001b[39;49m\u001b[43m)\u001b[49m\u001b[43m,\u001b[49m\n\u001b[32m 1279\u001b[39m \u001b[43m \u001b[49m\u001b[43mpassword\u001b[49m\u001b[43m=\u001b[49m\u001b[38;5;28;43;01mFalse\u001b[39;49;00m\u001b[43m,\u001b[49m\n\u001b[32m 1280\u001b[39m \u001b[43m\u001b[49m\u001b[43m)\u001b[49m\n",
"\u001b[36mFile \u001b[39m\u001b[32m/opt/anaconda3/lib/python3.13/site-packages/ipykernel/kernelbase.py:1320\u001b[39m, in \u001b[36mKernel._input_request\u001b[39m\u001b[34m(self, prompt, ident, parent, password)\u001b[39m\n\u001b[32m 1317\u001b[39m \u001b[38;5;28;01mexcept\u001b[39;00m \u001b[38;5;167;01mKeyboardInterrupt\u001b[39;00m:\n\u001b[32m 1318\u001b[39m \u001b[38;5;66;03m# re-raise KeyboardInterrupt, to truncate traceback\u001b[39;00m\n\u001b[32m 1319\u001b[39m msg = \u001b[33m\"\u001b[39m\u001b[33mInterrupted by user\u001b[39m\u001b[33m\"\u001b[39m\n\u001b[32m-> \u001b[39m\u001b[32m1320\u001b[39m \u001b[38;5;28;01mraise\u001b[39;00m \u001b[38;5;167;01mKeyboardInterrupt\u001b[39;00m(msg) \u001b[38;5;28;01mfrom\u001b[39;00m\u001b[38;5;250m \u001b[39m\u001b[38;5;28;01mNone\u001b[39;00m\n\u001b[32m 1321\u001b[39m \u001b[38;5;28;01mexcept\u001b[39;00m \u001b[38;5;167;01mException\u001b[39;00m:\n\u001b[32m 1322\u001b[39m \u001b[38;5;28mself\u001b[39m.log.warning(\u001b[33m\"\u001b[39m\u001b[33mInvalid Message:\u001b[39m\u001b[33m\"\u001b[39m, exc_info=\u001b[38;5;28;01mTrue\u001b[39;00m)\n",
"\u001b[31mKeyboardInterrupt\u001b[39m: Interrupted by user"
]
}
],
"source": [
"def get_customer_orders(inventory):\n",
"\n",
" while True:\n",
" try:\n",
" num_orders = int(input(\"Enter the number of customer orders: \"))\n",
" if num_orders < 0:\n",
" print(\"Invalid input: number must be positive.\")\n",
" elif num_orders == 0:\n",
" print(\"No customer orders\")\n",
" else:\n",
" break\n",
" except ValueError:\n",
" print(\"Invalid input: please enter a numeric value.\")\n",
"\n",
" customer_orders = set()\n",
"\n",
"\n",
" for i in range(num_orders):\n",
" while True:\n",
" product = input(f\"Enter the name of product #{i + 1}: \")\n",
"\n",
" if product not in inventory:\n",
" print(\"Invalid product: not in inventory.\")\n",
" elif inventory[product] <= 0:\n",
" print(\"Invalid product: out of stock.\")\n",
" else:\n",
" customer_orders.add(product)\n",
" break\n",
"\n",
" return customer_orders\n",
"\n",
"inventory = {'t-shirt': 3, 'mug': 0, 'hat': 1, 'book': 3, 'keychain': 4}\n",
"\n",
"orders = get_customer_orders(inventory)\n",
"print(orders)\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4e56e926-cfc6-4ce5-9693-f4291fb3a4b4",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python [conda env:base] *",
"language": "python",
"name": "python3"
"name": "conda-base-py"
},
"language_info": {
"codemirror_mode": {
Expand All @@ -90,7 +209,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down