Adding and updating key-value pairs in Python - Mini Project: Build & Apply

Adding and updating key-value pairs

📖 Scenario: You are managing a small store's inventory. You need to keep track of the products and their quantities using a dictionary.

🎯 Goal: Create a dictionary with initial products and quantities, add a new product, update the quantity of an existing product, and then display the final inventory.

📋 What You'll Learn

Create a dictionary called inventory with exact products and quantities

Add a new product with a specific quantity to inventory

Update the quantity of an existing product in inventory

Print the final inventory dictionary

💡 Why This Matters

🌍 Real World

Managing inventory is a common task in stores and warehouses to keep track of product quantities.

💼 Career

Knowing how to add and update key-value pairs in dictionaries is essential for data management and software development.

1

Create the initial inventory dictionary

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

Python

# Create the inventory dictionary with apples, bananas, and oranges
# Your code here

Need a hint?

Use curly braces {} to create a dictionary with keys and values separated by colons.

2

Add a new product to the inventory

Add a new product 'pears' with quantity 12 to the inventory dictionary.

Python

inventory = {'apples': 10, 'bananas': 5, 'oranges': 8}
# Add 'pears' with quantity 12 to inventory
# Your code here

Need a hint?

Use square brackets [] with the new key to add it to the dictionary.

3

Update the quantity of an existing product

Update the quantity of 'bananas' in the inventory dictionary to 7.

Python

inventory = {'apples': 10, 'bananas': 5, 'oranges': 8}
inventory['pears'] = 12
# Update 'bananas' quantity to 7
# Your code here

Need a hint?

Use the key 'bananas' with square brackets to assign the new quantity.

4

Display the final inventory

Print the inventory dictionary to show all products and their quantities.

Python

inventory = {'apples': 10, 'bananas': 5, 'oranges': 8}
inventory['pears'] = 12
inventory['bananas'] = 7
# Print the inventory dictionary
# Your code here

Need a hint?

Use the print() function to display the dictionary.