Summary  
This chapter covers how to declare, name, and assign values to variables in Python, illustrating dynamic typing and basic operations you can perform on variable data.  

General domain of usage  
Data analysis

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 TestExtraStudentsCalculation(unittest.TestCase):

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

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

    def test_correct_value_stored(self):
        import user_code
        expected_value = user_code.classes * user_code.students
        actual_value = user_code.total_students
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `total_students` variable contains `{expected_value}`.",
            f"Expected `total_students` to be `{expected_value}`, but got `{actual_value}`."
        )

    def test_correct_value_stored(self):
        import user_code
        expected_value = user_code.total_students // 27
        actual_value = user_code.total_classes
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `total_classes` variable contains `{expected_value}`.",
            f"Expected `total_classes` to be `{expected_value}`, but got `{actual_value}`."
        )

    def test_correct_total_students_stored(self):
        import user_code
        expected_value = user_code.classes * user_code.students
        actual_value = user_code.total_students
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `total_students` variable contains `{expected_value}`.",
            f"Expected `total_students` to be `{expected_value}`, but got `{actual_value}`."
        )

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

test_main.py

Python is een geïnterpreteerde, high-level, general-purpose programmeertaal. In tegenstelling tot HTML, CSS en JavaScript, die voornamelijk worden gebruikt voor webontwikkeling, is Python veelzijdig en toepasbaar in diverse domeinen, waaronder softwareontwikkeling, data science en back-end ontwikkeling. In deze cursus worden de kernaspecten van Python behandeld en aan het einde ben je in staat om je eigen functies te schrijven.

Verdiep je in de basisprincipes van Python, verken je werkomgeving en voer eenvoudige wiskundige bewerkingen uit. Leer hoe je leesbare code schrijft met behulp van opmerkingen en hoe je zowel eenvoudige als geavanceerde wiskundige expressies verwerkt en de resultaten weergeeft.

Uitdaging: Werken met Variabelen

Oplossing

Uitdaging: Werken met Variabelen

Oplossing