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332 changes: 329 additions & 3 deletions lab-python-flow-control.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -37,13 +37,339 @@
"\n",
"3. Instead of updating the inventory by subtracting 1 from the quantity of each product, only do it for the products that were ordered (those in \"customer_orders\")."
]
},
{
"cell_type": "code",
"execution_count": 52,
"id": "d2bf0db2-808a-4404-906d-1f650b8fed95",
"metadata": {},
"outputs": [],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"inventory = {}"
]
},
{
"cell_type": "code",
"execution_count": 64,
"id": "196c2c88-46dc-48de-916f-7f2253943dd6",
"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": [
"UPDATED INVENTORY: {'t-shirt': 10, 'mug': 10, 'hat': 10, 'book': 10, 'keychain': 10}\n"
]
}
],
"source": [
"# 1.1 - Look at the code from the lab data structures, and improve repeated code with loops.\n",
"\n",
"def ask_quantity(product):\n",
" while True:\n",
" quantity = input(f\"Please enter the quantity of '{product}' available in the inventory: \")\n",
" if quantity.isdigit():\n",
" return int(quantity)\n",
" else:\n",
" print(f\"Invalid input for '{product}'. The quantity must be a whole positive number. Try again.\")\n",
"\n",
"for product in products:\n",
" inventory[product] = ask_quantity(product)\n",
"\n",
"print(\"UPDATED INVENTORY:\", inventory)"
]
},
{
"cell_type": "code",
"execution_count": 65,
"id": "675f0139-77e7-43ac-ac1c-dc40fae09d02",
"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: hat\n",
"Enter product nº 3: book\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"CUSTOMER ORDER: hat, book, mug\n"
]
}
],
"source": [
"# 1.2 - Look at the code from the lab data structures, and improve repeated code with loops.\n",
"\n",
"customer_order = set()\n",
"\n",
"print(\"PRODUCTS LIST: \", \", \".join(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_order) < 3:\n",
" order = input(f\"Enter product nº {len(customer_order)+1}: \").strip().lower()\n",
" \n",
" if order not in products:\n",
" print(f\"Error: '{order.upper()}' is not in the products list. Try again.\")\n",
" \n",
" elif order in customer_order:\n",
" print(f\"Error: You've already chosen '{order.upper()}'. Pick a different product.\")\n",
"\n",
" else:\n",
" customer_order.add(order)\n",
"\n",
"print(\"CUSTOMER ORDER: \", \", \".join(customer_order))"
]
},
{
"cell_type": "code",
"execution_count": 66,
"id": "9b321ab0-9277-411b-8534-a854529737fd",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"PRODUCTS LIST: t-shirt, mug, hat, book, keychain\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"From the products list, enter the name of a product that a customer wants to order: hat\n",
"Do you want to input another order? (yes/no): yes\n",
"From the products list, enter the name of a product that a customer wants to order: book\n",
"Do you want to input another order? (yes/no): yes\n",
"From the products list, enter the name of a product that a customer wants to order: mug\n",
"Do you want to input another order? (yes/no): no\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"CUSTOMER ORDERS: hat, book, mug\n",
"UPDATED INVENTORY: {'t-shirt': 10, 'mug': 10, 'hat': 10, 'book': 10, 'keychain': 10}\n"
]
}
],
"source": [
"# 2 - Instead of asking the user to input the name of three products that a customer wants to order, do the following:\n",
"\n",
"\"\"\"a. Prompt the user to enter the name of a product that a customer wants to order.\n",
"\n",
"b. Add the product name to the \"customer_orders\" set.\n",
"\n",
"c. Ask the user if they want to add another product (yes/no).\n",
"\n",
"d. Continue the loop until the user does not want to add another product. \"\"\"\n",
"\n",
"customer_orders = set()\n",
"\n",
"print(\"PRODUCTS LIST: \", \", \".join(products))\n",
"\n",
"def process_order():\n",
" order = input(\"From the products list, enter the name of a product that a customer wants to order: \").strip().lower()\n",
" \n",
" if order not in products:\n",
" print(f\"Error: '{order.upper()}' is not in the products list. Try again.\")\n",
" return False\n",
" \n",
" elif order in customer_orders:\n",
" print(f\"Error: You've already chosen '{order.upper()}'. Pick a different product.\")\n",
" return False\n",
" \n",
" else:\n",
" customer_orders.add(order)\n",
"\n",
"process_order()\n",
"\n",
"while len(customer_orders) < 5:\n",
" wish_new_order = input(\"Do you want to input another order? (yes/no): \").strip().lower()\n",
" \n",
" if wish_new_order == \"yes\":\n",
" process_order()\n",
" elif wish_new_order == \"no\":\n",
" break\n",
" else:\n",
" print(\"Invalid input: must enter 'yes' or 'no'!\")\n",
"\n",
"print(\"CUSTOMER ORDERS:\", \", \".join(customer_orders))\n"
]
},
{
"cell_type": "code",
"execution_count": 67,
"id": "ec5e006d-1771-40a2-ab04-1a3b8af3d5f4",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"PRODUCTS LIST: t-shirt, mug, hat, book, keychain\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"From the products list, enter the name of a product that a customer wants to order: hd\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: 'HD' is not in the products list. Try again.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Do you want to input another order? (yes/no): yes\n",
"From the products list, enter the name of a product that a customer wants to order: hat\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"'HAT' has been added to your order.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Do you want to input another order? (yes/no): yes\n",
"From the products list, enter the name of a product that a customer wants to order: boo\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: 'BOO' is not in the products list. Try again.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Do you want to input another order? (yes/no): yes\n",
"From the products list, enter the name of a product that a customer wants to order: book\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"'BOOK' has been added to your order.\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Do you want to input another order? (yes/no): no\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"CUSTOMER ORDERS: hat, book\n",
"UPDATED INVENTORY: {'t-shirt': 10, 'mug': 10, 'hat': 9, 'book': 9, 'keychain': 10}\n"
]
}
],
"source": [
"# 3 - Instead of updating the inventory by subtracting 1 from the quantity of each product, only do it for the products that were ordered (those in \"customer_orders\").\n",
"\n",
"customer_orders = set()\n",
"\n",
"print(\"PRODUCTS LIST: \", \", \".join(products))\n",
"\n",
"def process_order():\n",
" order = input(\"From the products list, enter the name of a product that a customer wants to order: \").strip().lower()\n",
" \n",
" if order not in products:\n",
" print(f\"Error: '{order.upper()}' is not in the products list. Try again.\")\n",
" return False\n",
" \n",
" elif order in customer_orders:\n",
" print(f\"Error: You've already chosen '{order.upper()}'. Pick a different product.\")\n",
" return False\n",
"\n",
" elif inventory[order] <= 0:\n",
" print(f\"Error: '{order.upper()}' is out of stock. Please choose another product.\")\n",
" return False\n",
" \n",
" else:\n",
" customer_orders.add(order)\n",
" inventory[order] -= 1\n",
" print(f\"'{order.upper()}' has been added to your order.\")\n",
"\n",
"process_order()\n",
"\n",
"while len(customer_orders) < 5:\n",
" wish_new_order = input(\"Do you want to input another order? (yes/no): \").strip().lower()\n",
" \n",
" if wish_new_order == \"yes\":\n",
" process_order()\n",
" \n",
" elif wish_new_order == \"no\":\n",
" break\n",
" \n",
" else:\n",
" print(\"Invalid input: must enter 'yes' or 'no'!\")\n",
"\n",
"print(\"CUSTOMER ORDERS:\", \", \".join(customer_orders))\n",
"print(\"UPDATED INVENTORY:\", inventory)\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "1f297a9b-af5b-4173-a037-d266c5612c44",
"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 @@ -55,7 +381,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.5"
}
},
"nbformat": 4,
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