Summary  
This chapter covers how to merge immutable sequence types by concatenating tuples using the `+` operator to produce a new sequence.

General domain of usage  
Data processing and manipulation


I Python er det muligt at kombinere tuples. Dette indebærer at danne en ny tuple ved at sammenflette to eller flere eksisterende. Du kan opnå dette med `+`-operatoren. Her er et eksempel til illustration.

movie_titles = ("Inception", "Interstellar", "Dunkirk")
release_years = (2010, 2014, 2017)

# Concatenate the tuples
combined_tuple = movie_titles + release_years

print(combined_tuple)

import unittest
import importlib
import re

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_movies_about_animals_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'animal_movies'),
            "The `animal_movies` variable is declared.",
            "Expected `animal_movies` to be declared."
        )

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

    def test_movies_about_animals_contains_correct_values(self):
        import user_code
        expected_values = tuple(user_code.new_movies)
        _dynamic_test(
            self,
            user_code.animal_movies == expected_values,
            f"The `animal_movies` contains `{expected_values}`.",
            f"Expected `animal_movies` to contain `{expected_values}`, but got `{user_code.animal_movies}`."
        )

    def test_movie_poster_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'movie_poster'),
            "The `movie_poster` variable is declared.",
            "Expected `movie_poster` to be declared."
        )

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

    def test_movie_poster_contains_correct_values(self):
        import user_code
        expected_values = user_code.space_movies + user_code.animal_movies
        _dynamic_test(
            self,
            set(user_code.movie_poster) == set(expected_values),
            f"The `movie_poster` contains `{expected_values}`.",
            f"Expected `movie_poster` to contain `{expected_values}`, but got `{user_code.movie_poster}`."
        )

    def test_tuple_function_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'tuple\s*\(', user_code_source),
            "The `tuple()` function is used.",
            "Expected the `tuple()` function to be used."
        )

    def test_concatenation_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'\+', user_code_source),
            "The `+` operator is used for tuple concatenation.",
            "Expected the `+` operator to be used for tuple concatenation."
        )

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 Immutable Sekvenser i Python

Løsning

Sammenfletning af Immutable Sekvenser i Python

Løsning