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Lab Day 4 done #652

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1770f64
Lab done
cadiyubu May 8, 2026
ebfb12f
Lab corrected
cadiyubu May 8, 2026
c898dcd
Lab corrected2
cadiyubu May 8, 2026
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264 changes: 261 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 +72,271 @@
"\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": 1,
"id": "66eb6ed7-2c82-40bf-b441-3b9f5b9300ec",
"metadata": {},
"outputs": [],
"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_input = False\n",
" while not valid_input:\n",
" try:\n",
" quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
" if quantity >= 0:\n",
" inventory[product] = quantity\n",
" valid_input = True\n",
" else:\n",
" print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a valid quantity.\")\n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "89f929cc-8735-4777-b590-c1804016a73a",
"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\n",
"#value), display an error message and ask them to re-enter the price for that \n",
"#product.\n",
"#Use a try-except block to handle the error and continue prompting the user \n",
"#until a valid price is entered.\n",
"\n",
"def calculate_total_price(customer_orders):\n",
" price_list=[]\n",
" for item in customer_orders:\n",
" valid_input = False\n",
" while not valid_input:\n",
" try:\n",
" price = float(input(f\"Enter the price of {item}s: \"))\n",
" if price >= 0:\n",
" price_list.append(price)\n",
" valid_input = True\n",
" else:\n",
" print(\"Price cannot be negative. Please enter a valid price.\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a valid price.\")\n",
" total_price= sum(price_list) \n",
" return f\"The total price of your order is: {total_price:.2f}\""
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "81ac72ff-3b5a-4777-8560-ee8021df9a6b",
"metadata": {},
"outputs": [],
"source": [
"#3. Modify the get_customer_orders function to include error handling.\n",
"\n",
"def get_customer_orders(inventory):\n",
" customer_orders = set()\n",
" valid_order=False\n",
" while not valid_order:\n",
" try:\n",
" norder=int(input(\"How many items do you want to order?\"))\n",
" valid_quant=False\n",
" if norder==0:\n",
" valid_order=True\n",
" elif norder>0:\n",
" valid_quant= False\n",
" valid_order=True\n",
" else:\n",
" print(\"Enter a positive number or zero\")\n",
" except ValueError:\n",
" print(\"Invalid input. Please number.\")\n",
" n=0 \n",
" while not valid_quant:\n",
" try:\n",
" item=input(\"Enter the name of the item:\")\n",
" \n",
" if item in inventory.keys() and inventory[item]>0:\n",
" customer_orders.add(item)\n",
" n+=1\n",
" if n==norder:\n",
" valid_quant=True\n",
" valid_order=True\n",
" elif item in inventory.keys() and inventory[item]==0:\n",
" print(\"Sorry, we are out of stock for that item.\") \n",
" else:\n",
" print(f\"The item does not exist in the inventory. We have {list(inventory.keys())}\") \n",
" \n",
" except ValueError:\n",
" print(\"Invalid input. Please enter a valid item\") \n",
" return customer_orders\n",
" \n",
" \n",
" \n",
"\n",
" \n",
" \n",
" "
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "c0f04dfc-5215-4318-9d65-d9c98efbe027",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of cups available: -1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Quantity cannot be negative. Please enter a valid quantity.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of cups available: a\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input. Please enter a valid quantity.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of cups available: d\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input. Please enter a valid quantity.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of cups available: 3\n",
"Enter the quantity of mugs available: 0\n",
"Enter the quantity of hats available: 1\n",
"Enter the quantity of shoess available: 2\n",
"How many items do you want to order? 2\n",
"Enter the name of the item: sd\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"The item does not exist in the inventory. We have ['cup', 'mug', 'hat', 'shoes']\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of the item: -1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"The item does not exist in the inventory. We have ['cup', 'mug', 'hat', 'shoes']\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of the item: cup\n",
"Enter the name of the item: mug\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Sorry, we are out of stock for that item.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of the item: hat\n",
"Enter the price of hats: 32\n",
"Enter the price of cups: 3.3\n"
]
},
{
"data": {
"text/plain": [
"'The total price of your order is: 35.30'"
]
},
"execution_count": 4,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"products=['cup','mug','hat','shoes']\n",
"inventory=initialize_inventory(products)\n",
"customer_orders=get_customer_orders(inventory)\n",
"calculate_total_price(customer_orders)\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "87807f1b-3f74-47c4-a5b2-ad960491bb5d",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"id": "2cb260b7-b77e-40a8-ba4b-7751939fa411",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"id": "a33bd362-3ce7-41b2-8834-28d0a4b248e1",
"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 +348,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down