Course Content

Python Data Structures

1. Mastering Python Lists

Creating Lists in Python: Declaring and Initializing Lists List Indexing in Python: Accessing Elements Efficiently Working with Nested Lists in Python Python List Length: Measuring and Managing List Size Modifying Lists in Python: Updating and Changing Elements Using the append() Method: Adding Elements to Lists Using the insert() Method: Placing Elements at Specific Positions Deleting Elements in Python Lists: Removing Items Safely Using the remove() Method: Deleting Specific Elements from Lists

2. Mastering Python Dictionaries

Creating a Dictionary in Python: Storing Key-Value Pairs Accessing Dictionary Values Accessing Dictionary Keys Adding Items to a Dictionary: Updating Key-Value Pairs Using the del Keyword: Removing Dictionary Entries Using the pop() Method: Deleting Elements with Return Values Using the popitem() Method: Removing the Last Inserted Item Using the clear() Method: Emptying a Dictionary Completely

3. Mastering Python Tuples

Creating a Tuple in Python: Defining Immutable Data Structures Accessing Elements in a Tuple: Indexing Technique Concatenating Tuples in Python: Merging Immutable Sequences Deleting Tuples in Python: Removing References to Tuples Updating Tuples in Python Adding Items to a Tuple: Alternative Approaches Using Lists Counting Elements in a Tuple: Using the count() Method Finding Elements in a Tuple: Using the index() Method for Lookup

4. Set

Creating a Set The add() Method The update() Method Accessing the Elements of a Set The remove() and discard() Methods The clear() Method

Adding Items to a Dictionary: Updating Key-Value Pairs

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:


              12
            
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:


              1234
            
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:


              1234
            
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.

Task

Swipe to start coding

You are given a dictionary authors_books and 2 variables: author_to_add and fitzgeralds_books.

Your goal:

Add a new author and their list of books to the authors_books dictionary.
The author should be the key, and the list of books should be the value.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

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Section 2. Chapter 4

Adding Items to a Dictionary: Updating Key-Value Pairs

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:


              12
            
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:


              1234
            
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:


              1234
            
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.

Task

Swipe to start coding

You are given a dictionary authors_books and 2 variables: author_to_add and fitzgeralds_books.

Your goal:

Add a new author and their list of books to the authors_books dictionary.
The author should be the key, and the list of books should be the value.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 4

Switch to desktop for real-world practiceContinue from where you are using one of the options below