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236 changes: 236 additions & 0 deletions lab_functions_end.ipynb
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{
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"# Lab | Functions"
]
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"source": [
"## Exercise: Managing Customer Orders with Functions\n",
"\n",
"In the previous exercise, you improved the code for managing customer orders by using loops and flow control. Now, let's take it a step further and refactor the code by introducing functions.\n",
"\n",
"Follow the steps below to complete the exercise:\n",
"\n",
"1. Define a function named `initialize_inventory` that takes `products` as a parameter. Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
"\n",
"2. Define a function named `get_customer_orders` that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. The function should return the `customer_orders` set.\n",
"\n",
"3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
"\n",
"4. Define a function named `calculate_order_statistics` that takes `customer_orders` and `products` as parameters. Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). The function should return these values.\n",
"\n",
"5. Define a function named `print_order_statistics` that takes `order_statistics` as a parameter. Inside the function, implement the code for printing the order statistics.\n",
"\n",
"6. Define a function named `print_updated_inventory` that takes `inventory` as a parameter. Inside the function, implement the code for printing the updated inventory.\n",
"\n",
"7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
"\n",
"Hints for functions:\n",
"\n",
"- Consider the input parameters required for each function and their return values.\n",
"- Utilize function parameters and return values to transfer data between functions.\n",
"- Test your functions individually to ensure they work correctly.\n",
"\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": 14,
"id": "eb74f191",
"metadata": {},
"outputs": [],
"source": [
"products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n"
]
},
{
"cell_type": "code",
"execution_count": 20,
"id": "bca24d45",
"metadata": {},
"outputs": [],
"source": [
"#1\n",
"def initialize_inventory(products):\n",
" \"\"\"\n",
" Initializes the inventory dict with products names as keys\n",
" and quantities as values.\n",
"\n",
" returns: dict --> initialized inventory\n",
" \"\"\"\n",
" inventory = {}\n",
" for product in products:\n",
" while True:\n",
" product_qt = int(input(f'Enter product quantity for {product}:'))\n",
" if product_qt >= 0:\n",
" inventory[product] = product_qt\n",
" break\n",
" else:\n",
" print('quantity must be positive number')\n",
" return inventory\n",
"\n",
"#2\n",
"def get_customer_orders():\n",
" \"\"\"\n",
" Prompt user to input product names for customer orders\n",
" and returns them as a set.\n",
"\n",
" returns: unique orderes product names\n",
" \"\"\"\n",
" customer_orders = set()\n",
" while True:\n",
" order_item = input('Enter product name to order: ').strip()\n",
" if order_item in products:\n",
" customer_orders.add(order_item)\n",
" print(f'{order_item} added to customer orders')\n",
" while True:\n",
" add_order = input('Order another product? (yes/no):').strip()\n",
" if add_order in ['yes', 'no']:\n",
" break\n",
" else:\n",
" print('Invalid input. Enter \"yes\" or \"no\".')\n",
" if add_order == 'no':\n",
" break\n",
" return customer_orders\n",
"\n",
"#3\n",
"def update_inventory(customer_orders, inventory):\n",
" \"\"\"\n",
" Updates inventory dict based on customer orders.\n",
" Reduces prodect quantity for each ordered product if available\n",
"\n",
" returns: None\n",
" \"\"\"\n",
" for order_item in customer_orders:\n",
" if order_item in inventory:\n",
" if inventory[order_item] > 0:\n",
" inventory[order_item] -= 1\n",
" print(f\"{order_item}. New quantity: {inventory[order_item]}\")\n",
" else:\n",
" print(f\"'{order_item}' is out of stock.\")\n",
" else:\n",
" print(f\"'{order_item}' not found in inventory.\")\n",
"\n",
"#4\n",
"def calculate_order_statistics(customer_orders, products):\n",
" \"\"\"\n",
" Calculates statistics based on customer orders\n",
" - Total nr. of unique products ordered\n",
" - Percentage of unique products ordered compared to available products\n",
" \n",
" returns: tuple (total_ordered, percentage_ordered)\n",
" \"\"\"\n",
" total_ordered = len(customer_orders)\n",
" total_available = len(products)\n",
" percentage_ordered = (total_ordered / total_available) * 100\n",
"\n",
" return (total_ordered, percentage_ordered)\n",
"\n",
"#5\n",
"def print_order_statistics(order_statistics):\n",
" \"\"\"\n",
" Prints the statistics calculated\n",
" \"\"\"\n",
" total_ordered, percentage_ordered = order_statistics\n",
" print('Order Statistics:')\n",
" print(f'Total Products Ordered: {total_ordered}')\n",
" print(f'Percentage of Products Ordered: {percentage_ordered:.2f}%')\n",
"\n",
"#6\n",
"def print_updated_inventory(inventory):\n",
" if inventory:\n",
" for product, quantity in inventory.items():\n",
" print(f'{product}: {quantity}')\n",
" else:\n",
" print('Inventory is empty.')\n",
" \n",
"\n",
"\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "2ee458ee",
"metadata": {},
"outputs": [],
"source": [
"#7 --> 1st option\n",
"current_inventory = initialize_inventory(products)\n",
"orders = get_customer_orders()\n",
"update_inventory(orders, current_inventory)\n",
"order_stats = calculate_order_statistics(orders, products)\n",
"print_order_statistics(order_stats)\n",
"print_updated_inventory(current_inventory)"
]
},
{
"cell_type": "code",
"execution_count": 23,
"id": "051a7119",
"metadata": {},
"outputs": [],
"source": [
"#7 --> 2nd option\n",
"def inventory_management ():\n",
" \"\"\"\n",
" Functions to initiate the program.\n",
" Calls all previous functions in a logical order\n",
" \"\"\"\n",
" products = ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
" current_inventory = initialize_inventory(products)\n",
" orders = get_customer_orders()\n",
" update_inventory(orders, current_inventory)\n",
" order_stats = calculate_order_statistics(orders, products)\n",
" print_order_statistics(order_stats)\n",
" print_updated_inventory(current_inventory)\n",
"\n",
" print('Process complete.')"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "1ff269b5",
"metadata": {},
"outputs": [],
"source": [
"#7 --> 2nd option \n",
"inventory_management()"
]
}
],
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