4.10.4: Inventory CodeHS general answer I see across the web:

STARTING_ITEMS_IN_INVENTORY = 20
num_items = STARTING_ITEMS_IN_INVENTORY

# Enter your code here

INVENTORY_ITEMS = 20
num = INVENTORY_ITEMS
while num > 0:
print("We have " + str(num) + " items in inventory.")
To_Buy = int(input("How many would you like to buy? "))
if To_Buy > num:
print("There is not enough in inventory for that purchase.")

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This code snippet for managing an inventory system in Python has a few issues that must be addressed for it to work correctly.

Let’s provide a corrected version of the code:

STARTING_ITEMS_IN_INVENTORY = 20

num_items = STARTING_ITEMS_IN_INVENTORY

while num_items > 0:
    print("We have " + str(num_items) + " items in inventory.")
    buy_num = int(input("How many would you like to buy? "))
    
    if buy_num <= num_items:
        num_items -= buy_num
        print("Now we have " + str(num_items) + " left.")
    else:
        print("There is not enough in inventory for that purchase.")
        
print("All out!")

Initialization:

• The program initializes the inventory count (STARTING_ITEMS_IN_INVENTORY) with a starting value.

While Loop:

• Continues running as long as the inventory (num_items) is greater than zero.

Buying Items:

• The user inputs the number of items they wish to buy.
• If the requested number (buy_num) is less than or equal to the available inventory, the program subtracts the purchased amount and updates the inventory.
• If the user requests more items than available, an error message is displayed.

End Condition:

• When the inventory reaches zero, the loop ends, and the program prints “All out!”.