サブウインドウでGraphicsViewを使用する方法　PyQt5

Pythonで、TableViewを作成しており、ボタンを押すとサブウインドウが開かれる仕様を作っております。
ただのサブウインドウでしたら、「self.w1 = QDialog(parent)」で対応できるのですが、サブウインドウに「GraphicsView」を設けますと、
「self.w1 = QDialog(parent)」をどのように使用したら良いのか、うまく使用できないとサブウインドウの「GraphicsView」は一瞬立ち上がってすぐ落ちます。　コードは色々と省略しましたが、主要部分を残しました。

class TableView(QTableWidget):
    def __init__(self, data, *args):
        QTableWidget.__init__(self, *args)

        self.resizeRowsToContents()                

class basicWindow(QWidget):
    def __init__(self, parent=None):
        
        self.w = QDialog(parent)
        self.w.setWindowTitle('Basic Grid Layout')
        grid_layout = QGridLayout()
        self.w.setLayout(grid_layout)
        
    def clickCallback10():
                    
         ex2 = sWindow()
         ex2.show()
                    
    g_1=""
    button_0 = QPushButton()
    button_0.clicked.connect(clickCallback10)
    button_0.setIcon(QtGui.QIcon(g_1))
    grid_layout.addWidget(button_0, y, x)
                                        
    def show(self):
        self.w.exec_()
    
class sWindow(QWidget):
    def __init__(self, parent=None):

        self.w1 = QDialog(parent)
        self.w1.setWindowTitle('Option')

        grid_layout = QGridLayout()
        self.w1.setLayout(grid_layout)
        
        def clickCallback22():

            widget = QtWidgets.QWidget(None) 
            leyout = QtWidgets.QVBoxLayout(widget) 
            leyout.addWidget( QtWidgets.QLabel(widget) ) 
            leyout.addWidget( GraphicsView(widget) ) 
            
            widget.setLayout(leyout) 
            widget.show() 
            
        self.w1.button12 = QPushButton('', self.w1)
        self.w1.button12.clicked.connect(clickCallback22)

    def show(self):
        self.w1.exec_()

class GraphicsView(QtWidgets.QGraphicsView): 
    def __init__(self, parent=None): 
        super(GraphicsView, self).__init__(parent)        

        self.w2 = QDialog(parent)
        self.w2.setWindowTitle('Option')

        scene = QtWidgets.QGraphicsScene(self.w2) 
        image = QtGui.QImage("") 

        pixmap = QtGui.QPixmap.fromImage(image) 
        scene.addPixmap(pixmap) 
        scene.setBackgroundBrush(QtCore.Qt.gray) 
        self.setScene(scene) 
        self.w2._numScheduledScalings = 0 
        self.w2.label = self.parent().findChild(QtWidgets.QLabel) 
        self.w2.coordinates = [] 
        
    def wheelEvent(self, event): 
        numDegrees = event.angleDelta().y() / 8 
        numSteps = numDegrees / 15 
        
        self.w2._numScheduledScalings += numSteps 
        if self.w2._numScheduledScalings * numSteps < 0: 
            self.w2._numScheduledScalings = numSteps 
        
        anim = QtCore.QTimeLine(350, self.w2) 
        anim.setUpdateInterval(20) 
        anim.valueChanged.connect(self.w2.scalingTime) 
        anim.finished.connect(self.w2.animFinished) 
        anim.start() 
        
    def scalingTime(self, x): 
        factor = 1.0 + float(self.w2._numScheduledScalings) / 300.0 
        self.scale(factor, factor) 
        
    
    def animFinished(self): 
        if self.w2._numScheduledScalings > 0: 
            self.w2._numScheduledScalings -= 1
        else: 
            self.w2._numScheduledScalings += 1 
            
    def mousePressEvent(self, event): 
        p = self.w2.mapToScene(event.pos()) 
        
        if event.button() == QtCore.Qt.MidButton: 
            self.w2.setDragMode(QtWidgets.QGraphicsView.ScrollHandDrag) 
            
            event = QtGui.QMouseEvent( 
                QtCore.QEvent.GraphicsSceneDragMove, 
                event.pos(),
                QtCore.Qt.MouseButton.LeftButton, 
                QtCore.Qt.MouseButton.LeftButton, 
                QtCore.Qt.KeyboardModifier.NoModifier 
                ) 
            
        elif event.button() == QtCore.Qt.LeftButton: 
            self.w2.setDragMode(QtWidgets.QGraphicsView.RubberBandDrag) 
        
        self.w2.coordinates = [p.x(), p.y()] 
        QtWidgets.QGraphicsView.mousePressEvent(self.w2, event) 
    
    def mouseReleaseEvent(self, event): 
        QtWidgets.QGraphicsView.mouseReleaseEvent(self.w2, event) 
        self.w2.setDragMode(QtWidgets.QGraphicsView.NoDrag) 
        if event.button() == QtCore.Qt.LeftButton: 
            p = self.w2.mapToScene(event.pos()) 
            self.w2.coordinates.extend([p.x(), p.y()]) 
            text = 'select area : ' + ','.join([ str(int(c)) for c in self.w2.coordinates]) 
            self.w2.label.setText(text) 
    
    def show(self):
        self.w2.exec_()


class window(QWidget):
    def __init__(self):
#        super(window, self).__init__(parent)
        super().__init__()

        self.initUI()

    def initUI(self):

        global table_,titleEdit,authorEdit,table_1_Edit
        global z1_s,r1_s,table_s,g1
        global num1,num2,data

        print(num1)
        
        self.centralwidget  = QtWidgets.QWidget(self)
        self.view           = QtWidgets.QTableView(self.centralwidget)

        self.table = TableView(data, num2, num1, self)
        
        self.button = QPushButton('削除', self)
    
def main():
    global app,ex,g1
    g1=0
    app = QtWidgets.QApplication(sys.argv)
    ex = window()
    ex.show()
    sys.exit(app.exec_())
if __name__ == '__main__':
   main()