Course Content
Python Data Structures
Python Data Structures
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:
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.
book = { "title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813 } # Attempting to remove a non-existent key removed_genre = book.pop("genre")
Swipe to start coding
You are given the same dictionary authors_books
.
Your goal:
- Remove
"Stephen King"
's books from the dictionary and save them in the variablekings_books
. - Use the
pop()
method to accomplish this.
Solution
Thanks for your feedback!
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:
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.
book = { "title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813 } # Attempting to remove a non-existent key removed_genre = book.pop("genre")
Swipe to start coding
You are given the same dictionary authors_books
.
Your goal:
- Remove
"Stephen King"
's books from the dictionary and save them in the variablekings_books
. - Use the
pop()
method to accomplish this.
Solution
Thanks for your feedback!