Python: Use fixture for unittest.TextTestRunner.run() - python-3.x

Question

Have defined Cases.py file with defined suite:
import unittest
import pytest
from adminzone_tests.Clients import TestClients
def collect_suite():
suite = unittest.TestSuite()
suite.addTest(TestClients)
return suite
#pytest.mark.usefixtures('admin_session')
def run():
unittest.TextTestRunner(verbosity=2).run(collect_suite())
#pytest.mark.usefixtures('client_session')
def run():
unittest.TextTestRunner(verbosity=2).run(collect_suite())
conftest.py file:
import pytest
from base.Common import Common
from base.Users import Users
#pytest.fixture(scope='session')
def admin_session(request):
Users.users('admin')
def admin_session_teardown():
Common.logout()
request.addfinalizer(admin_session_teardown)
#pytest.fixture(scope='session')
def client_session(request):
Users.users('client')
def client_session_teardown():
Common.logout()
request.addfinalizer(client_session_teardown)
Idea: execute the same suite one by one with different user's sessions.
But fixture executes only if has param autouse=True
How to make fixture executable without autouse=True and run the same suite with different setup ?

Answer 1

Finally i found solution that i was looking for, could be useful for somebody:
Used hook with command line args
conftest.py file:
import pytest
def pytest_addoption(parser):
# adding command line arg --user
parser.addoption('--users', action='append', default=['user1'])
def pytest_generate_tests(metafunc):
if 'users' in metafunc.fixturenames:
us = set(metafunc.config.option.users)
if not us:
us = ['user1']
elif 'all' in us:
us = ['user2', 'user1']
else:
us = list(us)
metafunc.parametrize('users', us, scope='session')
#pytest.yield_fixture(scope='session', autouse=True)
def define_users(request, users):
# Execute login here, as example called function with param of user_type
login(users)
def teardown():
# Execute logout here
logout()
request.addfinalizer(teardown)
Cases.py file:
import unittest
suite = unittest.TestSuite()
def collect_suite():
suite.addTest(TestClass1)
# adding more test classes here
def run():
unittest.TextTestRunner(verbosity=2).run(suite)
Now via command line execute command(in project's root dir)
python -m pytest Cases.py -s -v -n auto --users all
Test suite will be executed with login as user1, after will be executed with login as user2