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120 changes: 54 additions & 66 deletions lab-python-list-comprehension.ipynb
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"# Lab | List, Dict and Set Comprehension"
]
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"## Exercise: Managing Customer Orders Optimized with Comprehension"
]
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"In the previous exercise, you developed a program to manage customer orders and inventory. Now, let's take it a step further and incorporate comprehension into your code.\n",
"\n",
"Follow the steps below to complete the exercise:\n",
"\n",
"1. Review your code from the previous exercise and identify areas where you can apply comprehension to simplify and streamline your code. \n",
"\n",
" - *Hint: Apply it to initialize inventory, updating the inventory and printing the updated inventory.*\n",
" \n",
" - For example, in initializing the inventory, we could have:\n",
" \n",
" ```python\n",
" def initialize_inventory(products):\n",
" inventory = {product: int(input(f\"Enter the quantity of {product}s available: \")) for product in products}\n",
" return inventory\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
" ```\n",
"<br>\n",
" \n",
" \n",
"2. Modify the function get_customer_orders so it prompts the user to enter the number of customer orders and gathers the product names using a loop and user input. Use comprehension.\n",
"\n",
"3. Add a new function to calculate the total price of the customer order. For each product in customer_orders, prompt the user to enter the price of that product. Use comprehension to calculate the total price. Note: assume that the user can only have 1 unit of each product.\n",
"def initialize_inventory(products):\n",
" return {product: int(input(f\"Enter the quantity of {product}: \")) for product in products}\n",
"\n",
"4. Modify the update_inventory function to remove the product from the inventory if its quantity becomes zero after fulfilling the customer orders. Use comprehension to filter out the products with a quantity of zero from the inventory.\n",
"def get_customer_orders():\n",
" num_orders = int(input(\"Enter the number of products you want to order: \"))\n",
" return {input(f\"Enter the name of a product that the customer wants to order: \")\n",
" for _ in range(num_orders)}\n",
"\n",
"5. Print the total price of the customer order.\n",
"def update_inventory(inventory, customer_orders):\n",
" updated_inventory = {\n",
" product: (qty - 1 if product in customer_orders else qty)\n",
" for product, qty in inventory.items()\n",
" }\n",
" return {p: q for p,q in updated_inventory.items() if q > 0}\n",
"\n",
"Your code should produce output similar to the following:\n",
"def calculate_order_statistics(customer_orders, products):\n",
" total_products_ordered = len(customer_orders)\n",
" percentage_ordered = total_products_ordered / len(products) * 100\n",
" order_status = (total_products_ordered, percentage_ordered)\n",
" # return total_products_ordered, percentage_ordered\n",
" return order_status\n",
"\n",
"```python\n",
"Enter the quantity of t-shirts available: 5\n",
"Enter the quantity of mugs available: 4\n",
"Enter the quantity of hats available: 3\n",
"Enter the quantity of books available: 2\n",
"Enter the quantity of keychains available: 1\n",
"Enter the number of customer orders: 2\n",
"Enter the name of a product that a customer wants to order: hat\n",
"Enter the name of a product that a customer wants to order: keychain\n",
"def print_order_statistics(order_statistics):\n",
" print(\"Order Statistics:\")\n",
" print(\"Total Products Ordered:\", order_statistics[0])\n",
" print(\"Percentage of Products Ordered:\", order_statistics[1], \"%\")\n",
"\n",
"Order Statistics:\n",
"Total Products Ordered: 2\n",
"Percentage of Unique Products Ordered: 40.0\n",
"def print_updated_inventory(inventory):\n",
" print(\"Inventory after order:\")\n",
" for item in inventory:\n",
" print(item, inventory[item])\n",
"\n",
"Updated Inventory:\n",
"t-shirt: 5\n",
"mug: 4\n",
"hat: 2\n",
"book: 2\n",
"Enter the price of keychain: 5\n",
"Enter the price of hat: 10\n",
"Total Price: 15.0\n",
"\n",
"```\n"
"def calculate_total_price(customer_order):\n",
" prices = {product: float(input(f\"Enter the price of the product {product}:\")) for product in customer_order }\n",
" total_price = sum(prices.values())\n",
" return total_price\n",
"inventory = initialize_inventory(products)\n",
"customer_orders = get_customer_orders()\n",
"inventory = update_inventory(inventory, customer_orders)\n",
"order_statistics = calculate_order_statistics(customer_orders, products)\n",
"print_order_statistics(order_statistics)\n",
"total_price = calculate_total_price(customer_orders)\n",
"print_updated_inventory(inventory)\n",
"print(f\"Total price of the order: {total_price}\")"
]
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Expand All @@ -93,7 +81,7 @@
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