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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)
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.

Uppgift

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.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 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.

Uppgift

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.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 4. Kapitel 3
Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Vi beklagar att något gick fel. Vad hände?
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