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Lab_5 (2) #646

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06d5bf3
Update lab-python-error-handling.ipynb
roizherrerapilar-hub Apr 29, 2026
3a90cba
Update lab-python-error-handling.ipynb
roizherrerapilar-hub Apr 29, 2026
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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": "markdown",
"id": "0c33cc12",
"metadata": {},
"source": [
"Funcion: def initialize_inventory(products): - recibe una lista de productos y devuelve un diccionario con cantidades. \n",
"1. Crear diccionario vacio\n",
"2. Recorrer productos\n",
"3. Bucle infinito (while True) - no salgo de aqui hasta que el usuario lo haga bien\n",
"4. Intentar convertir en numero (try) - aqui puede fallar si el usuario escribe 'hola' (valueError) o '5.5' \n",
"5. Validacion manual:\n",
"if quantity < 0:\n",
" print('Must be >=0') esto lo ponemos porque no queremos valores negativos. \n",
"6. \n"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "054fb350",
"metadata": {},
"outputs": [],
"source": [
"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",
" valid_quantity = True\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" inventory[product] = quantity\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "5957c81e",
"metadata": {},
"outputs": [],
"source": [
"def calculate_total_price(customer_orders):\n",
" total_price = 0\n",
"\n",
" for product in customer_orders:\n",
" while True:\n",
" try:\n",
" price = float(input(f\"Enter the price for {product}: \"))\n",
"\n",
" if price < 0:\n",
" raise ValueError(\"Price cannot be negative.\")\n",
"\n",
" total_price += price\n",
" break\n",
"\n",
" except ValueError as error:\n",
" print(f\"Error: {error}. Please enter a valid price.\")\n",
"\n",
" return total_price"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "112e97f7",
"metadata": {},
"outputs": [],
"source": [
"def get_customer_orders(inventory):\n",
" customer_orders = set()\n",
"\n",
" while True:\n",
" try:\n",
" product = input(\"Enter the name of a product: \").lower()\n",
"\n",
" if product not in inventory:\n",
" raise ValueError(\"Product does not exist in inventory.\")\n",
"\n",
" if inventory[product] <= 0:\n",
" raise ValueError(\"Product is out of stock.\")\n",
"\n",
" customer_orders.add(product)\n",
" another_order = input(\"Do you want to add another product? (yes/no): \").lower()\n",
"\n",
" if another_order == \"no\":\n",
" break\n",
"\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" return customer_orders"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "f1b35e06",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Inventory: {'t-shirt': 5, 'mug': 4, 'hat': 8, 'book': 3, 'keychain': 9}\n",
"Customer orders: {'mug'}\n",
"Total price: 3.0\n"
]
}
],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"inventory = initialize_inventory(products)\n",
"\n",
"customer_orders = get_customer_orders(inventory)\n",
"\n",
"total_price = calculate_total_price(customer_orders)\n",
"\n",
"print(\"Inventory:\", inventory)\n",
"print(\"Customer orders:\", customer_orders)\n",
"print(\"Total price:\", total_price)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +218,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.14.4"
}
},
"nbformat": 4,
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