From 24c5543e7790b90a74f32a0630482966e7e0a939 2010-09-03 21:01:04
From: Brian Granger <ellisonbg@gmail.com>
Date: 2010-09-03 21:01:04
Subject: [PATCH] Fixing bug in guisupport.py

---

diff --git a/IPython/lib/guisupport.py b/IPython/lib/guisupport.py
index 9a8e3df..8356c60 100644
--- a/IPython/lib/guisupport.py
+++ b/IPython/lib/guisupport.py
@@ -110,13 +110,15 @@ def get_app_qt4(*args, **kwargs):
     from PyQt4 import QtGui
     app = QtGui.QApplication.instance()
     if app is None:
+        if not args:
+            args = ([''],)
         app = QtGui.QApplication(*args, **kwargs)
     return app
 
 def is_event_loop_running_qt4(app=None):
     """Is the qt4 event loop running."""
     if app is None:
-        app = get_app_qt4()
+        app = get_app_qt4([''])
     if hasattr(app, '_in_event_loop'):
         return app._in_event_loop
     else:
@@ -126,7 +128,7 @@ def is_event_loop_running_qt4(app=None):
 def start_event_loop_qt4(app=None):
     """Start the qt4 event loop in a consistent manner."""
     if app is None:
-        app = get_app_qt4()
+        app = get_app_qt4([''])
     if not is_event_loop_running_qt4(app):
         app._in_event_loop = True
         app.exec_()