text: import sys
  
  from PyQt5 import QtGui, QtWidgets
  from main_gui import GuiMainWindow
  
  
  if __name__ == '__main__':
  
      app = QtWidgets.QApplication(sys.argv)
      my_app = GuiMainWindow()
      my_app.show()
      my_app.canvas.InitDriver()
      my_app.setup_ifcopenshell_viewer(app)
      my_app.start_display(app)