lab-python-flow-control.ipynb

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    "# Lab | Flow Control"
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    "## Exercise: Managing Customer Orders Optimized\n",
    "\n",
    "In the last lab, you were starting an online store that sells various products. To ensure smooth operations, you developed a program that manages customer orders and inventory.\n",
    "\n",
    "You did so without using flow control. Let's go a step further and improve this code.\n",
    "\n",
    "Follow the steps below to complete the exercise:\n",
    "\n",
    "1. Look at your code from the lab data structures, and improve repeated code with loops.\n",
    "\n",
    "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",
    "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\")."
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      "Enter the quantity of t-shirts available:  10\n",
      "Enter the quantity of mugs available:  10\n",
      "Enter the quantity of hats available:  10\n",
      "Enter the quantity of books available:  10\n",
      "Enter the quantity of keychains available:  10\n"
     ]
    }
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    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
    "inventory = {}\n",
    "\n",
    "for product in products:\n",
    "    quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
    "    inventory[product] = quantity"
   ]
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     "text": [
      "Enter the name of a product that a customer wants to order:  mug\n",
      "Do you want to add another product? (yes/no):  yes\n",
      "Enter the name of a product that a customer wants to order:  hat\n",
      "Do you want to add another product? (yes/no):  no\n"
     ]
    }
   ],
   "source": [
    "customer_orders = set()\n",
    "add_another = 'yes'\n",
    "\n",
    "while add_another.lower() == 'yes':\n",
    "    product_name = input(\"Enter the name of a product that a customer wants to order: \")\n",
    "    customer_orders.add(product_name)\n",
    "    add_another = input(\"Do you want to add another product? (yes/no): \")"
   ]
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     "data": {
      "text/plain": [
       "{'hat', 'mug'}"
      ]
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     "execution_count": 5,
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   "source": [
    "customer_orders"
   ]
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   "source": [
    "for product in customer_orders:\n",
    "    if product in inventory:\n",
    "        inventory[product] -= 1"
   ]
  },
  {
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   "execution_count": 7,
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'t-shirt': 10, 'mug': 9, 'hat': 9, 'book': 10, 'keychain': 10}\n"
     ]
    }
   ],
   "source": [
    "print(inventory)"
   ]
  }
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