The pop() Method

The pop() method in Python dictionaries allows you to remove a key-value pair based on its key and returns the corresponding value. This method is particularly useful when you need to extract and process a value while simultaneously removing it from the dictionary.

The syntax is:


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book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813,
    "copies": 5
}

# Remove the 'copies' key and retrieve its value
removed_copies = book.pop("copies")

print("Updated dictionary:", book)
print("Removed value:", removed_copies)

If the key does not exist in the dictionary, Python raises a KeyError exception.


              12345678
            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813
}

# Attempting to remove a non-existent key
removed_genre = book.pop("genre")

Task

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The book's availability status is being tracked elsewhere. Use the pop() method to remove the available key from the book dictionary and print its value.

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Section 2. Chapter 7

The pop() Method

The syntax is:


              123456789101112
            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813,
    "copies": 5
}

# Remove the 'copies' key and retrieve its value
removed_copies = book.pop("copies")

print("Updated dictionary:", book)
print("Removed value:", removed_copies)

If the key does not exist in the dictionary, Python raises a KeyError exception.


              12345678
            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813
}

# Attempting to remove a non-existent key
removed_genre = book.pop("genre")

Task

Swipe to show code editor

The book's availability status is being tracked elsewhere. Use the pop() method to remove the available key from the book dictionary and print its value.

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 7

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