from PySide2 import QtWidgets, QtCore
import time
import sys


class SomeWidget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(SomeWidget, self).__init__(parent)
        self.setWindowTitle(QtCore.qVersion())
        self.thread = QtCore.QThread()
        
        self.progress = QtWidgets.QProgressDialog("", "Cancel", 0, 100, self)
        self.progress.setWindowModality(QtCore.Qt.WindowModal)
        self.progress.setAutoClose(True)
        self.progress.setAutoReset(True)
        
        self.worker = Worker()
        self.worker.moveToThread(self.thread)
        self.worker.update_progress.connect(self.progress.setValue)
        self.worker.done.connect(self.work_done)
        self.thread.started.connect(self.worker.do_the_thing)
    
        self.thread.start()
        
    def work_done(self):
        self.thread.exit()
        print("Done")


class Worker(QtCore.QObject):
    update_progress = QtCore.Signal(int)
    done = QtCore.Signal()
    
    def do_the_thing(self):
        for ii in range(1, 101):
            time.sleep(0.1)  # Simulate work
            self.update_progress.emit(ii)
        self.done.emit()


if __name__ == '__main__':
    print(QtCore.QLibraryInfo.build())
    app = QtWidgets.QApplication()
    widget = SomeWidget()
    widget.show()
    sys.exit(app.exec_())