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Leer Using the remove() and discard() Methods | Mastering Python Sets
Python Data Structures
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Cursusinhoud

Python Data Structures

Python Data Structures

2. Mastering Python Dictionaries
3. Mastering Python Tuples
4. Mastering Python Sets

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Using the remove() and discard() Methods

Sets in Python allow you to remove elements using the remove() and discard() methods. While both methods remove specific elements, there is a key difference:

  • remove(): raises a KeyError if the element is not in the set;
  • discard(): does not raise an error if the element is not found; it simply leaves the set unchanged.

Let's explore these methods using a movie collection theme.

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# Attempting to remove movies movies = {"Inception", "Interstellar", "Tenet", "Dunkirk"} # Remove specific movies movies.remove("Dunkirk") movies.remove("Avatar") # This will raise a `KeyError`
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Now, let's use the discard() method, which behaves similarly but avoids errors if the specified movie is not in the set.

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# Define a set of favorite movies movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"} # Remove specific movies using discard movies.discard("Dunkirk") movies.discard("Memento") movies.discard("Avatar") # Print the result print("Final set:", movies)
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Taak

Swipe to start coding

You are given the set marvel_movies. However, two movies from another studio have accidentally been added to this set.

  • Remove the movie "The Dark Knight" from the set.
  • Remove the movie "Justice League" from the set.
  • Use the discard() or remove() methods to accomplish this task.

Oplossing

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Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 4. Hoofdstuk 5
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book
Using the remove() and discard() Methods

Sets in Python allow you to remove elements using the remove() and discard() methods. While both methods remove specific elements, there is a key difference:

  • remove(): raises a KeyError if the element is not in the set;
  • discard(): does not raise an error if the element is not found; it simply leaves the set unchanged.

Let's explore these methods using a movie collection theme.

123456
# Attempting to remove movies movies = {"Inception", "Interstellar", "Tenet", "Dunkirk"} # Remove specific movies movies.remove("Dunkirk") movies.remove("Avatar") # This will raise a `KeyError`
copy

Now, let's use the discard() method, which behaves similarly but avoids errors if the specified movie is not in the set.

12345678910
# Define a set of favorite movies movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"} # Remove specific movies using discard movies.discard("Dunkirk") movies.discard("Memento") movies.discard("Avatar") # Print the result print("Final set:", movies)
copy
Taak

Swipe to start coding

You are given the set marvel_movies. However, two movies from another studio have accidentally been added to this set.

  • Remove the movie "The Dark Knight" from the set.
  • Remove the movie "Justice League" from the set.
  • Use the discard() or remove() methods to accomplish this task.

Oplossing

Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 4. Hoofdstuk 5
Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
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