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Python Data Structures
course content

Course Content

Python Data Structures

Python Data Structures

1. List
Creating a ListList IndexingNested ListList LengthModifying a ListThe append() MethodThe insert() MethodDeleting ElementsThe remove() Method
2. Dictionary
Creating a DictionaryAccessing Dictionary ValuesAccessing Dictionary KeysAdding ItemsChallenge: Expand the DictionaryThe del KeywordThe pop() MethodThe popitem() MethodThe clear() Method
3. Tuple
Creating a Tuple Accessing Elements in a TupleConcatenating TuplesDeleting a TupleUpdating a TupleAdding Items to a TupleCounting Elements in a TupleFinding Elements in a Tuple
4. Set
Creating a SetThe add() MethodThe update() MethodAccessing the Elements of a SetThe remove() and discard() MethodsThe clear() Method

book
The update() Method

The update() method in Python allows you to add multiple elements to a set at once. This method takes an iterable (like a list, tuple, or another set) and adds its elements to the existing set.

The update() method can accept:

  • Lists: [movie1, movie2, ...];
  • Tuples: (movie1, movie2, ...);
  • Other Sets: {movie1, movie2, ...}.

              
12345678

            
# Original set of favorite movies
favorite_movies = {"Inception", "Interstellar", "Tenet"}

# Adding multiple new movies
favorite_movies.update(["Tenet", "Memento", "The Prestige"])

# Print the updated set
print(favorite_movies)
copy

Note

If any element being added already exists in the set, it will not be duplicated. The order of elements in a set is not guaranteed and may vary.

Task
test

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You've watched a few more movies and want to add multiple titles to your favorite_movies set. Use the update() method to add the movies "Memento" and "The Prestige". Print the updated set.

Solution

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Section 4. Chapter 3
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book
The update() Method

The update() method in Python allows you to add multiple elements to a set at once. This method takes an iterable (like a list, tuple, or another set) and adds its elements to the existing set.

The update() method can accept:

  • Lists: [movie1, movie2, ...];
  • Tuples: (movie1, movie2, ...);
  • Other Sets: {movie1, movie2, ...}.

              
12345678

            
# Original set of favorite movies
favorite_movies = {"Inception", "Interstellar", "Tenet"}

# Adding multiple new movies
favorite_movies.update(["Tenet", "Memento", "The Prestige"])

# Print the updated set
print(favorite_movies)
copy

Note

If any element being added already exists in the set, it will not be duplicated. The order of elements in a set is not guaranteed and may vary.

Task
test

Swipe to show code editor

You've watched a few more movies and want to add multiple titles to your favorite_movies set. Use the update() method to add the movies "Memento" and "The Prestige". Print the updated set.

Solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 4. Chapter 3
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