Dictionary keys, values, and items in Python - Mini Project: Build & Apply

Explore Dictionary Keys, Values, and Items

📖 Scenario: You work in a small bookstore. You have a dictionary that stores book titles as keys and their prices as values.You want to learn how to get just the book titles, just the prices, and both together in pairs.

🎯 Goal: Build a program that shows how to get the keys, values, and items from a dictionary.

📋 What You'll Learn

Create a dictionary called books with exact entries: 'Python Basics': 29.99, 'Data Science': 39.95, 'Machine Learning': 49.50

Create a variable called book_titles that stores the keys of books

Create a variable called book_prices that stores the values of books

Create a variable called book_items that stores the items of books

Print book_titles, book_prices, and book_items in that order

💡 Why This Matters

🌍 Real World

Dictionaries are used to store related data, like product names and prices, user information, or settings. Knowing how to get keys, values, and items helps you access and use this data easily.

💼 Career

Many programming jobs require working with dictionaries or similar data structures. Being comfortable with keys, values, and items is essential for data processing, web development, and automation tasks.

1

Create the books dictionary

Create a dictionary called books with these exact entries: 'Python Basics': 29.99, 'Data Science': 39.95, 'Machine Learning': 49.50

Python

# Create the dictionary called books with the given entries
# Your code here

Need a hint?

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

2

Get the keys and values

Create a variable called book_titles that stores the keys of books using the keys() method. Then create a variable called book_prices that stores the values of books using the values() method.

Python

books = {'Python Basics': 29.99, 'Data Science': 39.95, 'Machine Learning': 49.50}
# Create book_titles with books.keys()
# Create book_prices with books.values()
# Your code here

Need a hint?

Use dictionary.keys() to get all keys and dictionary.values() to get all values.

3

Get the items

Create a variable called book_items that stores the items of books using the items() method.

Python

books = {'Python Basics': 29.99, 'Data Science': 39.95, 'Machine Learning': 49.50}
book_titles = books.keys()
book_prices = books.values()
# Create book_items with books.items()
# Your code here

Need a hint?

Use dictionary.items() to get all key-value pairs as tuples.

4

Print the keys, values, and items

Print the variables book_titles, book_prices, and book_items in that order, each on its own line.

Python

books = {'Python Basics': 29.99, 'Data Science': 39.95, 'Machine Learning': 49.50}
book_titles = books.keys()
book_prices = books.values()
book_items = books.items()
# Print book_titles, book_prices, and book_items
# Your code here

Need a hint?

Use three print() statements, one for each variable.