Install Pytest using pip install pytest to get started with testing your Python applications easily.
Test functions are written by prefixing the function name with test_ and can include multiple test cases.
Create a test file and write a basic test function: python def test_addition(): assert 1 + 1 == 2 Save the file with the prefix test_.
Run tests by executing the following command: pytest Pytest will discover all tests in files starting with test_.
You can test multiple inputs using @pytest.mark.parametrize: python @pytest.mark.parametrize("a, b, result", [(1, 2, 3), (2, 3, 5)]) def test_add(a, b, result): assert a + b == result
To test if a function raises an exception, use: python def test_zero_division(): with pytest.raises(ZeroDivisionError): 1 / 0