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update the lab of handle errors #556

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Test pusth to github
MonicaFernandezM Jan 15, 2026
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Update the lab of handle errors
MonicaFernandezM Jan 15, 2026
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218 changes: 216 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 +72,225 @@
"\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": 27,
"id": "4b3f4a1d",
"metadata": {},
"outputs": [],
"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",
" 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": 28,
"id": "ded52063",
"metadata": {},
"outputs": [],
"source": [
"#2. Modify the `calculate_total_price` function to include error handling.\n",
"#- If the user enters an invalid price (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter \n",
"# the price for that product.\n",
"#- Use a try-except block to handle the error and continue prompting the user until a valid price is entered.\n",
"def calculate_total_price(customer_orders):\n",
" total = 0 \n",
" for product in customer_orders:\n",
" while True:\n",
" try: \n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
" if price < 0:\n",
" raise ValueError(\"Price cannot be negative\")\n",
" total += price\n",
" break\n",
" except ValueError as e:\n",
" print(f\"Invalid input: {e}. Please enter a non-negative number.\") \n",
" return total "
]
},
{
"cell_type": "code",
"execution_count": 24,
"id": "4da9f0eb",
"metadata": {},
"outputs": [],
"source": [
"#3. Modify the `get_customer_orders` function to include error handling.\n",
"#- If the user enters an invalid number of orders (e.g., a negative value or a non-numeric \n",
"# value), display an error message and ask them to re-enter the number of orders.\n",
"#- If the user enters an invalid product name (e.g., a product name that is not in the \n",
"# inventory), or that doesn't have stock available, display an error message and ask \n",
"# them to re-enter the product name. *Hint: you will need to pass inventory as a parameter*\n",
"#- Use a try-except block to handle the error and continue prompting the user until a \n",
"# valid product name is entered.\n",
"\n",
"def get_customer_orders(inventory):\n",
" while True:\n",
" try: \n",
" number_orders = int(input(\"Enter the number of customer orders: \"))\n",
" if number_orders <= 0:\n",
" raise ValueError(\"Number of order have to be greater than 0.\")\n",
" break \n",
" except ValueError as e:\n",
" print(f\"Invalid Value: {e}. Try again, enter a postive integer.\")\n",
"\n",
"\n",
" customer_orders = []\n",
" for i in range(number_orders):\n",
" while True: \n",
" product = input(f\"Enter a product name {i+1}: \").strip()\n",
" if product not in inventory:\n",
" print(f\"Product not available. Choose from: {list(inventory.keys())}\")\n",
" elif inventory[product] <= 0:\n",
" print(f\"{product} is out of stock.\")\n",
" else:\n",
" customer_orders.append(product)\n",
" break\n",
" \n",
" return customer_orders\n"
]
},
{
"cell_type": "markdown",
"id": "004bd5d6",
"metadata": {},
"source": [
"### Llamadas"
]
},
{
"cell_type": "code",
"execution_count": 33,
"id": "5b4ee123",
"metadata": {},
"outputs": [],
"source": [
"products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']"
]
},
{
"cell_type": "code",
"execution_count": 34,
"id": "99b50013",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Invalid quantity! Please enter a non-negative value.\n",
"Error: invalid literal for int() with base 10: 'jh'\n"
]
},
{
"data": {
"text/plain": [
"{'t-shirt': 5, 'mug': 4, 'hat': 3, 'book': 2, 'keychain': 1}"
]
},
"execution_count": 34,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"inventory = initialize_inventory(products)\n",
"inventory"
]
},
{
"cell_type": "code",
"execution_count": 35,
"id": "befe1172",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid Value: invalid literal for int() with base 10: 'i'. Try again, enter a postive integer.\n",
"Invalid Value: invalid literal for int() with base 10: 'df'. Try again, enter a postive integer.\n",
"Invalid Value: invalid literal for int() with base 10: 'hfghfh'. Try again, enter a postive integer.\n",
"Invalid Value: Number of order have to be greater than 0.. Try again, enter a postive integer.\n",
"Product not available. Choose from: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"Product not available. Choose from: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"Product not available. Choose from: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n"
]
},
{
"data": {
"text/plain": [
"['hat', 'keychain']"
]
},
"execution_count": 35,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"customer_order = get_customer_orders(inventory)\n",
"customer_order"
]
},
{
"cell_type": "code",
"execution_count": 36,
"id": "c61c604a",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input: could not convert string to float: 'gdfg'. Please enter a non-negative number.\n",
"Invalid input: could not convert string to float: 'af'. Please enter a non-negative number.\n",
"Invalid input: Price cannot be negative. Please enter a non-negative number.\n"
]
},
{
"data": {
"text/plain": [
"15.0"
]
},
"execution_count": 36,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"total_price = calculate_total_price(customer_order)\n",
"total_price"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4cfd9c80",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +304,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.10.2"
}
},
"nbformat": 4,
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