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Week2Lab2_Done #578

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157 changes: 155 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 +72,164 @@
"\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": "3568d015",
"metadata": {},
"outputs": [],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"def initialize_inventory(products):\n",
" inventory = {}\n",
" for product in products:\n",
" while True:\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",
" inventory[product] = quantity\n",
" break\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "7456c646",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: doll is not available.\n",
"{'mug', 'book'}\n"
]
}
],
"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 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 inventory), \n",
" # or that doesn't have stock available, display an error message and ask them to re-enter the product name. \n",
" # *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 valid product name is entered.\n",
"\n",
"def get_customer_orders(inventory):\n",
" customer_orders = set()\n",
"\n",
" while True:\n",
" try:\n",
" order_number = int(input(\"Enter the number of orders: \"))\n",
" if order_number <= 0:\n",
" raise ValueError(\"Invalid number of orders! Please enter a non-negative value.\")\n",
" break\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
"\n",
" for _ in range(order_number):\n",
"\n",
" while True:\n",
" try:\n",
" product = input(\"Enter product name: \")\n",
" if product not in inventory:\n",
" raise ValueError(f\"Product {product} is not available.\")\n",
" if inventory[product] <= 0:\n",
" raise ValueError(\"Product is out of stock\")\n",
" \n",
" customer_orders.add(product)\n",
" break \n",
" \n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
" \n",
" \n",
" return customer_orders\n",
"\n",
"customer_orders = get_customer_orders(inventory)\n",
"print(customer_orders)\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": 34,
"id": "052c06f6",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'t-shirt': 3, 'mug': 19, 'hat': 22, 'book': 32, 'keychain': 12}\n"
]
}
],
"source": [
"#3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. \n",
"# Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
"\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" for product in customer_orders:\n",
" inventory[product] -= 1\n",
" return inventory \n",
"\n",
"updated_inventory = update_inventory(customer_orders, inventory)\n",
"print(updated_inventory)"
]
},
{
"cell_type": "code",
"execution_count": 36,
"id": "49c3b175",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"34.0\n"
]
}
],
"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), \n",
" # display an error message and ask them to re-enter 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",
"\n",
"def total_price_of_order(customer_orders):\n",
" product_price = {} \n",
"\n",
" for product in customer_orders:\n",
" valid_price = False\n",
" while not valid_price:\n",
" try:\n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
" if price < 0:\n",
" raise ValueError(\"Invalid price! Please enter a non-negative value.\")\n",
" product_price[product] = price \n",
" valid_price = True\n",
" except ValueError as error:\n",
" print(f\"Error: {error}\")\n",
"\n",
" total_price = sum(product_price.values())\n",
" return total_price\n",
"\n",
"total_price_of_order = total_price_of_order(customer_orders)\n",
"print(total_price_of_order)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +243,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down