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Lab Python Data-structures Solution #543

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1fd72ce
data structures lab solution version1
Antonio-Gouveia Aug 29, 2025
e8e5d11
data structures lab solution version2
Antonio-Gouveia Aug 29, 2025
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238 changes: 235 additions & 3 deletions lab-python-data-structures.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -50,13 +50,245 @@
"\n",
"Solve the exercise by implementing the steps using the Python concepts of lists, dictionaries, sets, and basic input/output operations. "
]
},
{
"cell_type": "code",
"execution_count": 100,
"metadata": {},
"outputs": [],
"source": [
"# 1 - Define a list called products that contains the following items: \"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\".\n",
"\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
]
},
{
"cell_type": "code",
"execution_count": 101,
"metadata": {},
"outputs": [],
"source": [
"# 2 - Create an empty dictionary called inventory.\n",
"\n",
"inventory = {}"
]
},
{
"cell_type": "code",
"execution_count": 102,
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Please enter the quantity of 't-shirt' available in the inventory: 10\n",
"Please enter the quantity of 'mug' available in the inventory: 10\n",
"Please enter the quantity of 'hat' available in the inventory: 10\n",
"Please enter the quantity of 'book' available in the inventory: 10\n",
"Please enter the quantity of 'keychain' available in the inventory: 10\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'t-shirt': 10, 'mug': 10, 'hat': 10, 'book': 10, 'keychain': 10}\n"
]
}
],
"source": [
"# 3 - Ask the user to input the quantity of each product available in the inventory\n",
"\n",
"for product in products: \n",
" while True:\n",
" quantity = input(f\"Please enter the quantity of '{product}' available in the inventory: \") \n",
" if quantity.isdigit():\n",
" inventory[product] = int(quantity)\n",
" break\n",
" else:\n",
" print(f\"Invalid input for '{product}'. The quantity must be a whole positive number. Try again\")\n",
"print(inventory)"
]
},
{
"cell_type": "code",
"execution_count": 103,
"metadata": {},
"outputs": [],
"source": [
"# 4 - Create an empty set called customer_orders.\n",
"customer_orders = set()"
]
},
{
"cell_type": "code",
"execution_count": 104,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"PRODUCTS LIST: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"From the PRODUCTS LIST, please enter the name of three products that a customer wants to order.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter product nº 1: mug\n",
"Enter product nº 2: at\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Invalid input. You must enter a product from the list. Try again.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter product nº 2: hat\n",
"Enter product nº 3: book\n"
]
}
],
"source": [
"# 5 - Ask the user to input the name of three products that a customer wants to order\n",
"\n",
"print(\"PRODUCTS LIST: \", products)\n",
"print(\"From the PRODUCTS LIST, please enter the name of three products that a customer wants to order.\") \n",
"\n",
"while len(customer_orders) < 3:\n",
" order = input(f\"Enter product nº {len(customer_orders)+1}: \").strip().lower()\n",
" \n",
" if order in products:\n",
" if order in customer_orders:\n",
" print(f\"You've already entered '{order.upper()}'. Please enter a different product from the list.\")\n",
" else:\n",
" customer_orders.add(order)\n",
" else:\n",
" print(\"Invalid input. You must enter a product from the list. Try again.\")\n",
" "
]
},
{
"cell_type": "code",
"execution_count": 105,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'mug', 'book', 'hat'}\n"
]
}
],
"source": [
"# 6 - Print the products in the `customer_orders` set.\n",
"\n",
"print(customer_orders)"
]
},
{
"cell_type": "code",
"execution_count": 106,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"60.0%\n"
]
}
],
"source": [
"# 7- Calculate the following order statistics:\n",
" # 7.1 - Total Products Ordered: The total number of products in the `customer_orders` set.\n",
"total_products_ordered = len(customer_orders)\n",
" # 7.2 - Percentage of Products Ordered: The percentage of products ordered compared to the total available products.\n",
"percentage_of_products_ordered = (len(customer_orders)/len(products))*100\n",
"print(f\"{percentage_of_products_ordered}%\")\n"
]
},
{
"cell_type": "code",
"execution_count": 107,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Order Statistics:\n",
"Total Products Ordered: 3\n",
"Percentage of Products Ordered: 60.0%\n"
]
}
],
"source": [
"# 8 - Print the order statistics:\n",
"print(\"Order Statistics:\")\n",
"print(f\"Total Products Ordered: {total_products_ordered}\")\n",
"print(f\"Percentage of Products Ordered: {percentage_of_products_ordered}%\")\n"
]
},
{
"cell_type": "code",
"execution_count": 108,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'t-shirt': 9, 'mug': 9, 'hat': 9, 'book': 9, 'keychain': 9}\n"
]
}
],
"source": [
"# 9 - Update the inventory by subtracting 1 from the quantity of each product. \n",
"for product in inventory:\n",
" inventory[product] -= 1"
]
},
{
"cell_type": "code",
"execution_count": 113,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"t-shirt: 9\n",
"mug: 9\n",
"hat: 9\n",
"book: 9\n",
"keychain: 9\n"
]
}
],
"source": [
"# 10 - Print the updated inventory, displaying the quantity of each product on separate lines.\n",
"\n",
"for product, quantity in inventory.items():\n",
" print(f\"{product}: {quantity}\")"
]
}
],
"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 @@ -68,7 +300,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.5"
}
},
"nbformat": 4,
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