Course Content
Python Data Structures
Python Data Structures
Adding Items
Dictionaries are dynamic, meaning you can add, update, or remove items after the dictionary has been created. Let's explore how to add new items to a dictionary.
Start with creating a dictionary called book with some initial details:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813} print(book)
To make our dictionary more complete, we can add a new key-value pair to it. For example, we might want to add the genre of the book:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813} book["genre"] = "Romance" print(book)
After adding the new key-value pair, the dictionary now includes:
Updating an Existing Key-Value Pair
If you need to update the value of an existing key, you can do so by reassigning a new value to that key. For example, let's assume the book's publication year was corrected to 1815:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813, "genre": "Romance"} book["year"] = 1815 print(book)
Note
Single
' 'and double" "quotes in Python are interchangeable and equivalent.
Swipe to show code editor
Update the book dictionary by adding a new key called "available" with a value of True to indicate the book's availability in the library.
Solution
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Adding Items
Dictionaries are dynamic, meaning you can add, update, or remove items after the dictionary has been created. Let's explore how to add new items to a dictionary.
Start with creating a dictionary called book with some initial details:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813} print(book)
To make our dictionary more complete, we can add a new key-value pair to it. For example, we might want to add the genre of the book:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813} book["genre"] = "Romance" print(book)
After adding the new key-value pair, the dictionary now includes:
Updating an Existing Key-Value Pair
If you need to update the value of an existing key, you can do so by reassigning a new value to that key. For example, let's assume the book's publication year was corrected to 1815:
book = {"title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813, "genre": "Romance"} book["year"] = 1815 print(book)
Note
Single
' 'and double" "quotes in Python are interchangeable and equivalent.
Swipe to show code editor
Update the book dictionary by adding a new key called "available" with a value of True to indicate the book's availability in the library.
Solution
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Switch to desktop for real-world practiceContinue from where you are using one of the options below