What approaches and methodologies do you use when developing software products?

When developing software products, I use several key approaches and methodologies:

• Modular programming — breaking down code into independent, reusable modules.
• Testing (TDD/BDD) — writing tests before or along with the code to ensure quality and prevent regressions.
• Using version control systems (Git) — for managing changes and collaborative work.
• Code review — sharing experience and improving code quality through mutual checking.
• Clean code and PEP8 (for Python) — adhering to formatting and readability standards.
• Agile methodologies (Scrum, Kanban) — flexible project management with iterative delivery.

An example of a simple test using pytest in Python:

# test_example.py

def add(a, b):
    return a + b


def test_add():
    assert add(2, 3) == 5

This approach helps create maintainable and high-quality software.