import sys
from PySide2.QtCore import QObject, QThread, Slot
from PySide2.QtWidgets import QApplication

class Worker(QObject):

    @Slot()
    def do_work(self):
        print(f'Running on {QThread.currentThread().objectName()}')


class SubWorker(Worker):
    pass


app = QApplication([])
app.thread().setObjectName('Main Thread')
worker_thread = QThread()
worker_thread.setObjectName('Worker Thread')

worker = Worker()
#worker = SubWorker()

worker.moveToThread(worker_thread)
worker_thread.started.connect(worker.do_work)
worker_thread.start()

sys.exit(app.exec_())