Two examples using parametrize to test several inputs with the same test.

test_parametrized.py

"""
Parametrize allows you to run the same test with different inputs and expectations.
Each input will result in a separated test.

As first parameter of the mark, you name the variables in a string, separated by commas.
As second parameter, you input an iterable (a list) with tuples of the values of each case variables.
"""
import pytest


def make_sum(a, b):
    return sum([a, b])


# Check the docs here: https://docs.pytest.org/en/latest/parametrize.html
@pytest.mark.parametrize("first_summand, seccond_summand, expected", [
    (1, 1, 2),
    (1, 2, 3),
    (1, -1, 0),
    (12, 12, 24)
])
def test_parametrize(first_summand, seccond_summand, expected):
    assert make_sum(first_summand, seccond_summand) == expected


# An example of test checking an exception rises. Negative test is also importatnt
@pytest.mark.parametrize("first_summand, seccond_summand, excepction", [
    (1, "a", TypeError),
    (1, [2], TypeError),
])
def test_parametrize_exception(first_summand, seccond_summand, excepction):
    with pytest.raises(excepction):
        make_sum(first_summand, seccond_summand)