Software engineering is the process of designing, developing, testing, and maintaining software. It involves a range of best practices and methodologies, such as agile development, version control, and automated testing. Here's an example of a simple software engineering project in Python that uses the Pytest library for unit testing:
def add(a, b):
return a + b
import pytest
from main import add
def test_add():
assert add(2, 3) == 5
assert add(0, 0) == 0
assert add(-1, 1) == 0