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Submit my lab on error handling #654

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299 changes: 296 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 +72,306 @@
"\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": 14,
"id": "c74805e9-b8f8-4485-a828-c324abd17294",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of mugs in the inventory: 23\n",
"Enter the quantity of hats in the inventory: -2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Value error! Enter a non-negative number: \n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of hats in the inventory: ze\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: invalid literal for int() with base 10: 'ze'\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of hats in the inventory: 15\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'mug': 23, 'hat': 15}\n"
]
}
],
"source": [
"# Step 1: Define the function for initializing the inventory with error handling\n",
"\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 in the inventory:\"))\n",
" if quantity < 0:\n",
" raise ValueError(\"Value error! Enter a non-negative number: \")\n",
" valid_quantity = True\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" inventory[product] = quantity\n",
"\n",
" return inventory\n",
" "
]
},
{
"cell_type": "code",
"execution_count": 21,
"id": "859a28b3-2ed6-463f-9725-bd81ee68d4b2",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of book: -1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Input is invalid. Please enter a non negative value\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of book: 23\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Input is invalid. Please enter a non negative value\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of hat: 14\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Input is invalid. Please enter a non negative value\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of mug: 44\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Input is invalid. Please enter a non negative value\n"
]
},
{
"data": {
"text/plain": [
"['book', 'hat', 'mug']"
]
},
"execution_count": 21,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# 2. Modify the `calculate_total_price` function to include error handling.\n",
"def calculate_total_price(customer_orders):\n",
" products_price = []\n",
" \n",
" for product in customer_orders:\n",
" valid_input = False\n",
" while not valid_input:\n",
" try:\n",
" prod_price = int(input(f\"Enter the price of {product}: \"))\n",
" if prod_price >= 0:\n",
" products_price.append(product)\n",
" valid_input = True\n",
" raise ValueError(\"Input is invalid. Please enter a non negative value\")\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" return products_price\n"
]
},
{
"cell_type": "code",
"execution_count": 40,
"id": "7fb89bc1-a4b3-4649-bb36-f76267ecdf6e",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the number of orders: 3\n",
"Enter the product name: HOT\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Error: either you entered a wrong product or the product is unavailable!, try again\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the product name: HAT\n",
"Enter the product name: BOOK\n",
"Enter the product name: 123\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: Error: either you entered a wrong product or the product is unavailable!, try again\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the product name: MUG\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"({'book', 'hat', 'mug'}, 3)\n"
]
}
],
"source": [
"# 3. Modify the `get_customer_orders` function to include error handling\n",
"def get_customer_orders(inventory: dict):\n",
" \"\"\"\n",
" collects:\n",
" 1. Number of orders and \n",
" 2. Product names\n",
"\n",
" input: inventory -> dict\n",
"\n",
" output: number of orders, set of products (tuple)\n",
" \n",
" \"\"\"\n",
" \n",
" # 1. Collect Number of orders\n",
" valid_input = False\n",
" while not valid_input:\n",
" try:\n",
" number_of_orders = int(input(\"Enter the number of orders: \"))\n",
" if number_of_orders < 0 :\n",
" raise ValueError(f\"Number {number_of_orders} is negative. Enter a non-negative number: \")\n",
" valid_input = True\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" #2. Collect products\n",
" customer_orders = set()\n",
" while len(customer_orders) < number_of_orders:\n",
" valid_product = False\n",
" while not valid_product:\n",
" try:\n",
" product = (input(\"Enter the product name:\")).lower()\n",
" #Compare product to inventory & check nbr in inventory:\n",
" if product in inventory.keys() and inventory[product] > 0:\n",
" customer_orders.add(product)\n",
" valid_product = True\n",
" else:\n",
" raise ValueError(\"Error: either you entered a wrong product or the product is unavailable!, try again\")\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" return customer_orders ,number_of_orders\n"
]
},
{
"cell_type": "code",
"execution_count": 42,
"id": "9ecc97fc-6099-463e-a940-9875aa41a817",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the number of orders: 4\n",
"Enter the product name: HAT\n",
"Enter the product name: MUG\n",
"Enter the product name: BOOK\n",
"Enter the product name: SKIRT\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"({'skirt', 'mug', 'hat', 'book'}, 4)\n"
]
}
],
"source": [
"# 4. Test your code by running the program and deliberately entering\n",
"# invalid quantities and product names. Make sure the error handling mechanism works as expected.\n",
"products = [\"hat\", \"mug\", \"book\", \"t-shirt\", \"skirt\"]\n",
"#print(initialize_inventory(products))\n",
"print(get_customer_orders({'hat': 10, 'mug': 10, 'book': 10, 't-shirt': 10, 'skirt': 10}))\n"
]
}
],
"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 +383,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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