Summary  
The set.update() method merges multiple elements from any iterable (such as a list, tuple, or another set) into an existing set in Python, enabling bulk addition while preserving uniqueness.  

General domain of usage  
movie collection management

Metoden `update()` i Python gør det muligt at **tilføje flere elementer** til et set på én gang. Denne metode tager et itererbart objekt (som en **liste**, **tuple** eller et andet **set**) og tilføjer dets elementer til det eksisterende set.

Metoden `update()` kan acceptere:
- **Lister:** `[movie1, movie2, ...]`;
- **Tupler:** `(movie1, movie2, ...)`;
- **Andre sets:** `{movie1, movie2, ...}`.

# 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)

Hvis et element, der tilføjes, allerede findes i settet, vil det ikke blive duplikeret.
Rækkefølgen af elementer i et set er ikke garanteret og kan variere.

Bemærk

import unittest
import importlib

def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)

class TestUserCode(unittest.TestCase):
    def test_marvel_movies_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'marvel_movies'),
            "The `marvel_movies` set is declared.",
            "Expected `marvel_movies` to be declared."
        )

    def test_marvel_movies_is_set(self):
        import user_code
        _dynamic_test(
            self,
            isinstance(user_code.marvel_movies, set),
            "The `marvel_movies` is of type `set`.",
            "Expected `marvel_movies` to be of type `set`."
        )

    def test_movies_to_add_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'movies_to_add'),
            "The `movies_to_add` tuple is declared.",
            "Expected `movies_to_add` to be declared."
        )

    def test_movies_to_add_is_tuple(self):
        import user_code
        _dynamic_test(
            self,
            isinstance(user_code.movies_to_add, tuple),
            "The `movies_to_add` is of type `tuple`.",
            "Expected `movies_to_add` to be of type `tuple`."
        )

    def test_marvel_movies_contains_initial_movies(self):
        import user_code
        initial_movies = {
            'Avengers: Endgame',
            'Black Panther',
            'Iron Man'
        }
        _dynamic_test(
            self,
            initial_movies.issubset(user_code.marvel_movies),
            f"The `marvel_movies` contains the initial movies: {initial_movies}.",
            f"Expected `marvel_movies` to contain the initial movies: {initial_movies}, but got {user_code.marvel_movies}."
        )

    def test_marvel_movies_contains_new_movies(self):
        import user_code
        new_movies = {'Spider-Man: No Way Home', 'Guardians of the Galaxy'}
        _dynamic_test(
            self,
            new_movies.issubset(user_code.marvel_movies),
            f"The `marvel_movies` contains the newly added movies: {new_movies}.",
            f"Expected `marvel_movies` to contain the newly added movies: {new_movies}, but got {user_code.marvel_movies}."
        )

    def test_update_method_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            "update" in user_code_source,
            "The `update()` method is used to add movies.",
            "Expected the `update()` method to be used to add movies."
        )

if __name__ == '__main__':
    unittest.main()


test_main.py

Udforsk de grundlæggende datastrukturer i programmeringssproget Python, herunder lister, ordbøger, tupler og sæt, og lær hvordan de anvendes effektivt til at løse virkelige programmeringsudfordringer.

Hvad er en liste? En liste er en ordnet samling, der kan ændres. Den tillader også dublerede elementer.

Sammenfletning af Flere Elementer i et Sæt i Python

Løsning

Sammenfletning af Flere Elementer i et Sæt i Python

Løsning