PySide Qt script doesn't launch from Spyder but works from shell

Question

I have a weird bug in my project that uses PySide for its Qt GUI, and in response I\'m trying to test with simpler code that sets up the environment.

Here is the cod

Answer 1

I have the same problem, and somewhere on stackoverflow was a solution.

Instead of

qApp = QtGui.QApplication(sys.argv)

Use

qApp = QtGui.QApplication.instance()
if qApp is None:
        qApp = QtGui.QApplication(sys.argv)