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241 changes: 240 additions & 1 deletion lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,245 @@
"\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": 13,
"id": "79aae7b0-4357-4edb-be61-3c19f302a13f",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the quantity of t-shirts available: 1\n",
"Enter the quantity of mugs available: 5\n",
"Enter the quantity of hats available: 6\n",
"Enter the quantity of books available: 5\n",
"Enter the quantity of keychains available: 10\n",
"Enter the number of customer orders: 2\n",
"Enter the name of a product that a customer wants to order: t-shirt\n",
"Enter the name of a product that a customer wants to order: book\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"Updated Inventory: {'t-shirt': 0, 'mug': 5, 'hat': 6, 'book': 4, 'keychain': 10}\n",
"Customer order: {'t-shirt', 'book'}\n"
]
}
],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"inventory = {\n",
" product: int(input(f\"Enter the quantity of {product}s available: \"))\n",
" for product in products\n",
"}\n",
"\n",
"\n",
"def get_customer_orders(inventory):\n",
" n = int(input(\"Enter the number of customer orders: \"))\n",
" customer_orders = set()\n",
"\n",
" for _ in range(n):\n",
" product = input(\"Enter the name of a product that a customer wants to order: \").lower()\n",
" customer_orders.add(product)\n",
" inventory[product] -= 1 \n",
"\n",
" return customer_orders\n",
"\n",
"\n",
"customer_order = get_customer_orders(inventory)\n",
"\n",
"print(\"\\nUpdated Inventory:\", inventory)\n",
"print(\"Customer order:\", customer_order)\n"
]
},
{
"cell_type": "code",
"execution_count": 17,
"id": "40f62d47-392c-4450-897f-29b1754575df",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of t-shirt: a\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid price. Please enter a valid positive number.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of t-shirt: 0\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid price. Please enter a valid positive number.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of t-shirt: 10\n",
"Enter the price of book: 12\n"
]
},
{
"data": {
"text/plain": [
"22.0"
]
},
"execution_count": 17,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"#2 \n",
"def calculate_total_price(customer_order):\n",
"\n",
" prices = []\n",
"\n",
" for product in customer_order:\n",
" valid = False\n",
" \n",
" while not valid:\n",
" try:\n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
" \n",
" if price <= 0:\n",
" raise ValueError(\"Invalid price\")\n",
" \n",
" \n",
" prices.append(price)\n",
" valid = True \n",
" \n",
" except ValueError:\n",
" print(\"Invalid price. Please enter a valid positive number.\")\n",
"\n",
" return sum(prices)\n",
"calculate_total_price(customer_order)"
]
},
{
"cell_type": "code",
"execution_count": 15,
"id": "fea6dd9a-3752-4df9-a7df-e4ee1e00a2eb",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the number of customer orders: 2\n",
"Enter the name of a product: t-shirt\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: product out of stock. Choose another product.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of a product: book\n",
"Enter the name of a product: a\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: product not found in inventory. Try again.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of a product: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: product not found in inventory. Try again.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the name of a product: keychain\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Customer orders: ['book', 'keychain']\n"
]
}
],
"source": [
"def get_customer_orders(inventory):\n",
" valid = False\n",
" while not valid:\n",
" try:\n",
" n = int(input(\"Enter the number of customer orders: \"))\n",
" if n <= 0:\n",
" print(\"Error: please enter a positive number: \")\n",
" else:\n",
" valid = True\n",
" except ValueError:\n",
" print(\"Error: please enter a valid number of orders: \")\n",
"\n",
" customer_orders = []\n",
"\n",
" for _ in range(n):\n",
" valid = False\n",
" while not valid:\n",
" product = input(\"Enter the name of a product: \").strip().lower()\n",
"\n",
" if product not in inventory: \n",
" print(\"Error: product not found in inventory. Try again.\")\n",
" elif inventory[product] <= 0:\n",
" print(\"Error: product out of stock. Choose another product.\")\n",
" else:\n",
" customer_orders.append(product)\n",
" valid = True\n",
" \n",
" return customer_orders \n",
"\n",
" \n",
"orders = get_customer_orders(inventory)\n",
"print(\"Customer orders:\", orders) \n",
"\n",
" "
]
}
],
"metadata": {
Expand All @@ -90,7 +329,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down