ef initialize_inventory(products):

inventory = {}

for product in products:

quantity = int(input(f"Enter the quantity for {product}: "))

inventory[product] = quantity

return inventory

def get_customer_orders(products):

customer_orders = set()

while True:

order = ""

while order not in products:

order = input(f"Enter a product to order (choose from {', '.join(products)}): ")

if order not in products:

print("Invalid product name. Please choose from the available products.")

customer_orders.add(order)

continue_ordering = input("Do you want to add another product? (yes/no): ")

if continue_ordering != 'yes':

break

return customer_orders

def update_inventory(customer_orders, inventory):

for product in customer_orders:

if inventory[product] > 0:

inventory[product] -= 1

else:

print(f"Sorry, {product} is out of stock.")

def calculate_order_statistics(customer_orders, products):

total_products_ordered = len(customer_orders)

percentage_ordered = (total_products_ordered / len(products)) * 100

return total_products_ordered, percentage_ordered

def print_order_statistics(order_statistics):

print("Order Statistics:")

print(f"Total Products Ordered: {order_statistics[0]}")

print(f"Percentage of Products Ordered: {order_statistics[1]:.2f}%")

def print_updated_inventory(inventory):

print("Updated Inventory:")

for product, quantity in inventory.items():

print(f"{product}: {quantity}")

def main():

products = ["t-shirt", "mug", "hat", "book", "keychain"]

inventory = initialize_inventory(products)

customer_orders = get_customer_orders(products)

print("Customer ordered the following products:")

for item in customer_orders:

print(f"- {item}")

update_inventory(customer_orders, inventory)

order_statistics = calculate_order_statistics(customer_orders, products)

print_order_statistics(order_statistics)

print_updated_inventory(inventory)

# Run the program

main()