使用 occ 7.4.0 版本，pyqt5, 解决了init 缺少window_handle 的问题，另外添加一个左边的显示窗口

import ctypes
import logging
import os
import sys

from OCC.Display import OCCViewer
from PyQt5 import QtCore, QtGui, QtOpenGL, QtWidgets

# check if signal available, not available
# on PySide
HAVE_PYQT_SIGNAL = hasattr(QtCore, 'pyqtSignal')

logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
log = logging.getLogger(__name__)


class qtBaseViewer(QtOpenGL.QGLWidget):
# class qtBaseViewer(QtWidgets.QWidget):

    ''' The base Qt Widget for an OCC viewer
    '''
    def __init__(self, parent=None):
        super(qtBaseViewer, self).__init__(parent)

        # 获取 GUI 窗口句柄
        # window_handle = pyautogui.getActiveWindow().winId()