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Python Data Structures
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Python Data Structures

Python Data Structures

1. Mastering Python Lists
Creating Lists in Python: Declaring and Initializing ListsList Indexing in Python: Accessing Elements EfficientlyWorking with Nested Lists in PythonPython List Length: Measuring and Managing List SizeModifying Lists in Python: Updating and Changing ElementsUsing the append() Method: Adding Elements to ListsUsing the insert() Method: Placing Elements at Specific PositionsDeleting Elements in Python Lists: Removing Items SafelyUsing the remove() Method: Deleting Specific Elements from Lists
2. Mastering Python Dictionaries
Creating a Dictionary in Python: Storing Key-Value PairsAccessing Dictionary ValuesAccessing Dictionary KeysAdding Items to a Dictionary: Updating Key-Value PairsUsing the del Keyword: Removing Dictionary EntriesUsing the pop() Method: Deleting Elements with Return ValuesUsing the popitem() Method: Removing the Last Inserted ItemUsing the clear() Method: Emptying a Dictionary Completely
3. Mastering Python Tuples
Creating a Tuple in Python: Defining Immutable Data StructuresAccessing Elements in a Tuple: Indexing TechniqueConcatenating Tuples in Python: Merging Immutable SequencesDeleting Tuples in Python: Removing References to TuplesUpdating Tuples in PythonAdding Items to a Tuple: Alternative Approaches Using ListsCounting Elements in a Tuple: Using the count() MethodFinding Elements in a Tuple: Using the index() Method for Lookup
4. Mastering Python Sets
Creating a Set in Python: Defining Unordered CollectionsUsing the add() Method: Adding Single Elements to a SetUsing the update() Method: Merging Multiple Elements into a SetAccessing Elements in a Set: Iteration and Membership TestingUsing the remove() and discard() MethodsUsing the clear() Method: Removing All Elements from a Set

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Using the update() Method: Merging Multiple Elements into a Set

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, ...}.

              
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# 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)
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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.

Opgave

Swipe to start coding

You are given the set marvel_movies and the tuple movies_to_add.

  • Add both movies from the tuple to the set.
  • Use the update() method to accomplish this.

Løsning

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Sektion 4. Kapitel 3
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book
Using the update() Method: Merging Multiple Elements into a Set

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.

Opgave

Swipe to start coding

You are given the set marvel_movies and the tuple movies_to_add.

  • Add both movies from the tuple to the set.
  • Use the update() method to accomplish this.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 3
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
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