Removing dictionary entries in Python - Mini Project: Build & Apply

Removing dictionary entries

📖 Scenario: You are managing a small store's inventory. Some products are out of stock and need to be removed from the inventory list.

🎯 Goal: Build a program that removes products with zero stock from the inventory dictionary.

📋 What You'll Learn

Create a dictionary called inventory with product names as keys and stock counts as values.

Create a list called out_of_stock to hold products with zero stock.

Use a for loop to find products with zero stock and add them to out_of_stock.

Remove all products in out_of_stock from inventory.

Print the updated inventory dictionary.

💡 Why This Matters

🌍 Real World

Managing inventory is common in stores and warehouses to keep track of available products and remove items that are not currently sellable.

💼 Career

Knowing how to manipulate dictionaries and remove entries based on conditions is useful for data cleaning and management tasks in many programming jobs.

1

Create the inventory dictionary

Create a dictionary called inventory with these exact entries: 'apples': 10, 'bananas': 0, 'oranges': 5, 'pears': 0, 'grapes': 8.

Python

# Create the inventory dictionary with given products and stock counts
# Your code here

Need a hint?

Use curly braces {} to create the dictionary with the exact keys and values.

2

Create the out_of_stock list

Create an empty list called out_of_stock to store products with zero stock.

Python

inventory = {'apples': 10, 'bananas': 0, 'oranges': 5, 'pears': 0, 'grapes': 8}
# Create an empty list called out_of_stock
# Your code here

Need a hint?

Use square brackets [] to create an empty list.

3

Find and collect out-of-stock products

Use a for loop with variables product and stock to iterate over inventory.items(). Inside the loop, if stock is 0, add product to the out_of_stock list.

Python

inventory = {'apples': 10, 'bananas': 0, 'oranges': 5, 'pears': 0, 'grapes': 8}
out_of_stock = []
# Use a for loop to find products with zero stock and add them to out_of_stock
# Your code here

Need a hint?

Use inventory.items() to get product and stock pairs. Use append() to add to the list.

4

Remove out-of-stock products and print inventory

Use a for loop to iterate over out_of_stock and remove each product from inventory using del. Then print the updated inventory dictionary.

Python

inventory = {'apples': 10, 'bananas': 0, 'oranges': 5, 'pears': 0, 'grapes': 8}
out_of_stock = []
for product, stock in inventory.items():
    if stock == 0:
        out_of_stock.append(product)
# Remove products in out_of_stock from inventory
# Print the updated inventory
# Your code here

Need a hint?

Use del inventory[product] to remove a key from the dictionary.