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 TestStringIndexing(unittest.TestCase):

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

    def test_test_str_value_correct(self):
        import user_code
        expected_value = "This is a string for learning"
        actual_value = user_code.sample_text
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `sample_text` variable contains `{expected_value}`.",
            f"Expected `sample_text` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_first_char_value_correct(self):
        import user_code
        expected_value = user_code.sample_text[0]
        actual_value = user_code.first_char
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `first_char` variable contains `{expected_value}`.",
            f"Expected `first_char` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_last_char_value_correct(self):
        import user_code
        expected_value = user_code.sample_text[-1]
        actual_value = user_code.last_char
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `last_char` variable contains `{expected_value}`.",
            f"Expected `last_char` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_highlighted_word_value_correct(self):
        import user_code
        expected_value = "for"
        actual_value = user_code.highlighted_word
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `highlighted_word` variable contains `{expected_value}`.",
            f"Expected `highlighted_word` to be `{expected_value}`, but got `{actual_value}`."
        )

    def test_indexing_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'\[\d+\]', user_code_source) and re.search(r'\[-\d+\]', user_code_source),
            "Indexing is used to extract characters from the string.",
            "Expected indexing to be used to extract characters from the string."
        )

    def test_slicing_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'\[.*:.*\]', user_code_source),
            "String slicing is used to extract `for`.",
            "Expected string slicing to be used to extract `for`."
        )

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

test_main.py

Python est un langage de programmation interprété, de haut niveau et à usage général. Contrairement à HTML, CSS et JavaScript, principalement utilisés pour le développement web, Python est polyvalent et peut être utilisé dans divers domaines, notamment le développement logiciel, la science des données et le développement back-end. Dans ce cours, vous explorerez les aspects fondamentaux de Python et, à la fin, vous créerez vos propres fonctions.

Découvrez les bases de Python, explorez votre espace de travail et effectuez des opérations mathématiques simples. Apprenez à écrire un code lisible à l'aide de commentaires et à gérer des expressions mathématiques basiques et avancées tout en affichant vos résultats.

Défi : Extraction de Lettres à Partir d'une Chaîne

Solution