Is this PyQt 4 python bug or wrongly behaving code?

Question

Following code should create the QGraphicsView widget which owns one QGraphicsScene having text inside of it:

#!/usr/bin/python

import sys
from PyQt4.QtGui          


        

Answer 1

It looks to be related to the QApplication object being deleted when quitting, but I'm not sure why. Your code worked fine for me under Windows but I got the same seg fault output as you under an Ubuntu install.

I managed to get a clean exit with the following code as a work around.

#!/usr/bin/python

import sys
from PyQt4.QtGui import QApplication, QGraphicsView, QGraphicsScene


if __name__ == '__main__':
  app = QApplication(sys.argv)

  view = QGraphicsView()  
  scene = QGraphicsScene()

  scene.addText("Hello!")

  view.setScene(scene)
  view.show()

  app.exec_()
  app.deleteLater()
  sys.exit()