Check Availability

Part of the Logic & Flow section of Coddy's Python journey — lesson 70 of 78.

Challenge

Easy

Create a function named check_availability that takes one argument: item (string). The function should:

Check if the item exists in the inventory dictionary.
- If it does not exist, return "Item not found".
If the item exists, return the current stock of the item.

Add (replace) the following block of code at the bottom of your code:

add_item("Apple", 0.5, 100)
add_item("Banana", 0.2, 50)
update_stock("Apple", -20)
update_stock("Banana", 30)
print(check_availability("Apple"))  # Should return 80
print(check_availability("Banana"))  # Should return 80
print(check_availability("Orange"))  # Should return "Item not found"

Try it yourself

inventory = {}

def add_item(item, price, stock):
    if item in inventory:
        print(f"Error: Item '{item}' already exists.")
        return
    try:
        inventory[item] = {"price": float(price), "stock": int(stock)}
        print(f"Item '{item}' added successfully.")
    except ValueError:
        print("Error: Price and stock must be numeric.")

def update_stock(item, quantity):
    if item not in inventory:
        print(f"Error: Item '{item}' not found.")
        return
    try:
        new_stock = inventory[item]["stock"] + int(quantity)
        if new_stock < 0:
            print(f"Error: Insufficient stock for '{item}'.")
        else:
            inventory[item]["stock"] = new_stock
            print(f"Stock for '{item}' updated successfully.")
    except ValueError:
        print("Error: Quantity must be an integer.")


add_item("Apple", 0.5, 100)
add_item("Banana", 0.2, 50)
add_item("Apple", 0.6, 30)  # Should print an error
update_stock("Apple", -20)
update_stock("Banana", 30)
update_stock("Orange", 10)  # Should print an error
update_stock("Apple", -90)
print(inventory)