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


In Python, it's possible to combine tuples. This involves forming a new tuple by merging two or more existing ones. You can accomplish this with the `+` operator. Here's an example to illustrate.

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

Explore the fundamental data structures of the Python programming language, including lists, dictionaries, tuples, and sets, and learn how to apply them effectively to solve real-world programming challenges.

What is a list? A list is an ordered collection that can be modified. It also allows for duplicate elements.

Merging Immutable Sequences in Python

解答