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 es un lenguaje de programación de alto nivel interpretado y de propósito general. A diferencia de HTML, CSS y JavaScript, que se utilizan principalmente para el desarrollo web, Python es versátil y puede emplearse en diversos campos, incluidos el desarrollo de software, la ciencia de datos y el desarrollo back-end. En este curso, explorarás los aspectos fundamentales de Python y, al finalizar, podrás crear tus propias funciones.

Sumérgete en los conceptos básicos de Python, explora el entorno de trabajo y realiza operaciones matemáticas simples. Aprende a escribir código legible utilizando comentarios y a manejar expresiones matemáticas tanto básicas como avanzadas mientras muestras los resultados.

Desafío: Trabajo con Variables

Solución