pytest_parametrize.py

import pytest
from random import randint


def data_generator():
    # some logic
    return [_ * randint(0, 10) for _ in range(10)]


class TestClass(object):
    @pytest.mark.parametrize('param', data_generator())
    def test_data_generator(self, param):
        assert param

    @pytest.mark.parametrize('param', [_ * randint(0, 10) for _ in range(10)])
    def test_something(self, param):
        assert param