[PyQt] QMessageBox.question returns NoButton in python interactive

[Thomas Caswell]

I suspect, but can not prove, that this is related to PyOS_InputHook and
may depend on exactly which terminal emulator you are using on windows.

Tom

On Thu, Jun 27, 2019 at 3:01 PM Kyle Altendorf <sda at fstab.net> wrote:

> 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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-- 
Thomas Caswell
tcaswell at gmail.com
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