vtk嵌入pyqt5的窗口中

vtk嵌入pyqt5的窗口中，

from PyQt5.QtGui import *  
from PyQt5.QtWidgets import *  
from PyQt5.QtCore import *  
from PyQt5.QtOpenGL import QGLWidget  
import sys
from vtk import * 
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor  
 
  
class MainWindow(QMainWindow):  
    """docstring for Mainwindow"""  
    def __init__(self, parent = None):  
        super(MainWindow,self).__init__(parent)  
        self.basic()  
        splitter_main = self.split_()  
        self.setCentralWidget(splitter_main)  
  
    #窗口基础属性  
    def basic(self):  
        #设置标题，大小，图标  
        self.setWindowTitle("GT")  
        self.resize(1100,650)  
        self.setWindowIcon(QIcon("./image/Gt.png"))  
        #居中显示  
        screen = QDesktopWidget().geometry()  
        self_size = self.geometry()  
        self.move((screen.width() - self_size.width())/2,(screen.height() - self_size.height())/2)  
  
    #分割窗口  
    def split_(self):  
        splitte