From 0d139822a23d4b997fea5372dc702537a6b37c43 Mon Sep 17 00:00:00 2001 From: Alexander Stukowski Date: Sat, 23 Oct 2021 17:37:25 +0200 Subject: [PATCH] Do not call setQuitOnLastWindowClosed() on a QCoreApplication --- ipykernel/eventloops.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/ipykernel/eventloops.py b/ipykernel/eventloops.py index 1f7f47f3e..e2c8e9040 100644 --- a/ipykernel/eventloops.py +++ b/ipykernel/eventloops.py @@ -111,9 +111,11 @@ def loop_qt4(kernel): """Start a kernel with PyQt4 event loop integration.""" from IPython.lib.guisupport import get_app_qt4 + from IPython.external.qt_for_kernel import QtGui kernel.app = get_app_qt4([" "]) - kernel.app.setQuitOnLastWindowClosed(False) + if isinstance(kernel.app, QtGui.QApplication): + kernel.app.setQuitOnLastWindowClosed(False) _notify_stream_qt(kernel, kernel.shell_stream) _loop_qt(kernel.app)