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297 changes: 294 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 +72,304 @@
"\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": 11,
"id": "30baa24e-7c01-4838-a6a3-4b3d0b04aa48",
"metadata": {},
"outputs": [],
"source": [
"products=['t-shirt','mug','hat','book','keychain']\n"
]
},
{
"cell_type": "code",
"execution_count": 12,
"id": "b8bfe769-a9b9-4ea1-b97e-6cfaba76c457",
"metadata": {},
"outputs": [],
"source": [
"# 2 Modify the `calculate_total_price` function to include error handling.\n",
"\n",
"def initialize_inventory(products):\n",
" inventory = {}\n",
" \n",
" for product in products:\n",
" while True:\n",
" quantity = input(\"Enter the quantity of available \" + product + \"s : \")\n",
" \n",
" if quantity.isdigit():\n",
" inventory[product] = int(quantity)\n",
" break \n",
" else:\n",
" print(\"Invalid input, please try again\")\n",
" \n",
" return inventory"
]
},
{
"cell_type": "code",
"execution_count": 13,
"id": "1a5db72a-8640-4d6e-8b9e-6a2da1ae768f",
"metadata": {},
"outputs": [],
"source": [
"# 3\n",
"\n",
"def get_customer_order(inventory):\n",
" while True:\n",
" total_input = input(\"Enter the number of products you want to order:\").strip()\n",
" \n",
" if total_input.isdigit():\n",
" number_of_prod = int(total_input)\n",
" if number_of_prod > 0:\n",
" break \n",
" else:\n",
" print(\"To place an order please introduce a number of products greater than 0.\")\n",
" else:\n",
" print(\"Invalid input. Please enter the amount in the form of a whole number.\")\n",
"\n",
" customer_order = []\n",
" \n",
" \n",
" while len(customer_order) < number_of_prod:\n",
" product = input(\"Enter the name of the product you want to order: \").strip().lower()\n",
" \n",
" \n",
" if product not in inventory or inventory[product] <= 0:\n",
" \n",
" print(\"Please enter a valid product with stock available:\" + str(list(inventory.items())))\n",
" \n",
" \n",
" elif product in customer_order:\n",
" print(\"You already added this product to your order.\")\n",
" \n",
" else:\n",
" customer_order.append(product)\n",
" \n",
" return customer_order"
]
},
{
"cell_type": "code",
"execution_count": 14,
"id": "10c913f3-07c8-411d-a627-1249757f6af6",
"metadata": {},
"outputs": [],
"source": [
"def calculate_price(customer_order):\n",
" prices = []\n",
" for product in customer_order:\n",
" while True:\n",
" price_input = input(\"Enter the price of this product \" + product + \": \").strip()\n",
" \n",
" if price_input.replace(\".\", \"\", 1).isdigit():\n",
" price = float(price_input)\n",
" if price > 0:\n",
" prices.append(price)\n",
" break \n",
" else:\n",
" print(\"The price of the product must be greater than 0.\")\n",
" else:\n",
" print(\"Invalid input. Please enter a number and use '.' for decimals.\")\n",
" \n",
" total_price = sum(prices)\n",
" return total_price\n",
"\n",
"\n",
"\n",
"\n",
"def calculate_order_statistics(customer_order, products):\n",
" total = len(customer_order)\n",
" percentage = (total / len(products)) * 100\n",
" \n",
" print(\"Order Statistics:\")\n",
" print(\"Total Products Ordered: \" + str(total))\n",
" print(\"Percentage of Unique Products Ordered: \" + str(percentage))\n",
" \n",
" return total, percentage\n",
"\n",
"\n",
"def update_inventory(customer_order, inventory):\n",
" updated_inventory = {}\n",
" \n",
" for product in inventory:\n",
" value = inventory[product]\n",
" \n",
" if product in customer_order:\n",
" new_value = value - 1\n",
" else:\n",
" new_value = value\n",
" \n",
" if new_value > 0:\n",
" updated_inventory[product] = new_value\n",
" \n",
" return updated_inventory\n",
"\n",
"\n",
"def print_updated_inventory(inventory):\n",
" print(\"Updated inventory:\")\n",
" \n",
" final_inventory = []\n",
" for product in inventory:\n",
" quantity = inventory[product]\n",
" print(product + \": \" + str(quantity))\n",
" \n",
" return final_inventory"
]
},
{
"cell_type": "code",
"execution_count": 18,
"id": "6bbadfe9-9ce4-4312-abc5-3f7726133427",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"--- STEP 1: INITIALIZING INVENTORY ---\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of available t-shirts : 6\n",
"Enter the quantity of available mugs : 8\n",
"Enter the quantity of available hats : 9\n",
"Enter the quantity of available books : 25\n",
"Enter the quantity of available keychains : 1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Initial Inventory Dictionary: {'t-shirt': 6, 'mug': 8, 'hat': 9, 'book': 25, 'keychain': 1}\n",
"----------------------------------------\n",
"\n",
"--- STEP 2: GETTING CUSTOMER ORDER ---\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the number of products you want to order: 4\n",
"Enter the name of the product you want to order: mug \n",
"Enter the name of the product you want to order: hat\n",
"Enter the name of the product you want to order: book\n",
"Enter the name of the product you want to order: dog\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Please enter a valid product with stock available:[('t-shirt', 6), ('mug', 8), ('hat', 9), ('book', 25), ('keychain', 1)]\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of the product you want to order: t-shirt\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Customer Order List: ['mug', 'hat', 'book', 't-shirt']\n",
"----------------------------------------\n",
"\n",
"--- STEP 3: CALCULATING TOTAL PRICE ---\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of this product mug: 6\n",
"Enter the price of this product hat: 8\n",
"Enter the price of this product book: 19\n",
"Enter the price of this product t-shirt: 25\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Total Price to Pay: 58.0\n",
"----------------------------------------\n",
"\n",
"--- STEP 4: SHOWING ORDER STATISTICS ---\n",
"Order Statistics:\n",
"Total Products Ordered: 4\n",
"Percentage of Unique Products Ordered: 80.0\n",
"----------------------------------------\n",
"\n",
"--- STEP 5: UPDATING INVENTORY STOCK ---\n",
"----------------------------------------\n",
"\n",
"--- STEP 6: PRINTING THE FINAL INVENTORY ---\n",
"Updated inventory:\n",
"t-shirt: 5\n",
"mug: 7\n",
"hat: 8\n",
"book: 24\n",
"keychain: 1\n",
"=========================================\n"
]
}
],
"source": [
"products=['t-shirt','mug','hat','book','keychain']\n",
"\n",
"print(\"--- STEP 1: INITIALIZING INVENTORY ---\")\n",
"current_inventory = initialize_inventory(products)\n",
"print(\"Initial Inventory Dictionary:\", current_inventory)\n",
"print(\"-\" * 40)\n",
"\n",
"print(\"\\n--- STEP 2: GETTING CUSTOMER ORDER ---\")\n",
"order = get_customer_order(current_inventory)\n",
"print(\"Customer Order List:\", order)\n",
"print(\"-\" * 40)\n",
"\n",
"print(\"\\n--- STEP 3: CALCULATING TOTAL PRICE ---\")\n",
"total_to_pay = calculate_price(order)\n",
"print(\"Total Price to Pay: \" + str(total_to_pay))\n",
"print(\"-\" * 40)\n",
"\n",
"print(\"\\n--- STEP 4: SHOWING ORDER STATISTICS ---\")\n",
"stats = calculate_order_statistics(order, products)\n",
"print(\"-\" * 40)\n",
"\n",
"print(\"\\n--- STEP 5: UPDATING INVENTORY STOCK ---\")\n",
"current_inventory = update_inventory(order, current_inventory)\n",
"print(\"-\" * 40)\n",
"\n",
"print(\"\\n--- STEP 6: PRINTING THE FINAL INVENTORY ---\")\n",
"print_updated_inventory(current_inventory)\n",
"print(\"=========================================\")"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "5e27ec16-842f-4961-83e4-9cf2f447a80d",
"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 +381,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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