Дмитрий Лаптьев

class EnvironmentSetup(unittest.TestCase):
    base_config = None

    @classmethod
    def setUpClass(cls):
        cls.base_config = cls.setConfig()

    @classmethod
    def setConfig(cls):
        with open('../config.json') as file:
            config = json.load(file)
        return config

from tests.base.test import EnvironmentSetup as base_test
class Another:
    def __init__(self, params):
        print(base_test.base_config)  -> Получаю None соответственно