[PyQt] QMessageBox.question returns NoButton in python interactive

[Kyle Altendorf]

Seems to work ok in 5.9.2 and 5.12.1 in Linux here.  I get 16384 (Yes)
and 65536 (No). 

Though this is an odd program.  I thought message boxes maybe ran their
own event loop if needed but is showing a button and expecting it's
signals to emit functionally really proper? 

Cheers, 

-kyle 

On 2019-06-27 14:36, Luke Campagnola wrote:

> Greetings, 
> I have found that when calling QMessageBox.question, the message box flashes up briefly before disappearing and the call returns NoButton. This behavior is present in both PyQt4 and PyQt5 (most recently tested on 5.9.2 from anaconda package), on windows (but not linux), and only if I have not called QApplication.exec_() because I am running in an interactive python shell. 
> 
> Code to reproduce (run with python -i): 
> 
> import sys
> #from PyQt4 import QtGui as QtWidgets
> from PyQt5 import QtWidgets 
> 
> app = QtWidgets.QApplication([])
> 
> def msg():
> print(QtWidgets.QMessageBox.question(btn, "title", "message"))
> 
> btn = QtWidgets.QPushButton("show messagebox")
> btn.clicked.connect(msg)
> btn.show()
> 
> # message box works if event loop is started 
> # app.exec_() 
> 
> Cheers, 
> Luke 
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