i have similar problem as Darren:<br><br>after&nbsp;updating to Qt-4.3 and PyQt-4.3. When I run &quot;ipython -q4thread&quot;, I <br>get a stream of error messages:<br><br>QSocketNotifier: Can only be used with threads started with QThread
<br>QApplication::exec: Must be called from the main thread<br>QSocketNotifier: Can only be used with threads started with QThread<br>QApplication::exec: Must be called from the main thread<br>QSocketNotifier: Can only be used with threads started with QThread
<br>QApplication::exec: Must be called from the main thread<br>...<br><br>i tried to do sth. with this but it seems i lost the afternoon..<br><br>anyhow the problem comes from:<br>shell.py<br><br>class IPShellQt4(IPThread):
<br>&nbsp;&nbsp;mainloop(..):<br>&nbsp;&nbsp;&nbsp;&nbsp;while True:<br>&nbsp;&nbsp;&nbsp;&nbsp;...<br>&nbsp;&nbsp;&nbsp;&nbsp;QtGui.qApp.exec_() # this gives the messages<br><br>i tried hard, but i&nbsp;was&nbsp;unable&nbsp;to&nbsp;understand&nbsp;the&nbsp;good&nbsp;order&nbsp;of&nbsp;creating&nbsp;the&nbsp;qt&nbsp;thread application.&nbsp;in&nbsp;my&nbsp;opinion&nbsp;the&nbsp;one&nbsp;used&nbsp;in&nbsp;ipython&nbsp;is&nbsp;ok.&nbsp;(while comparing with tutorials).&nbsp;but&nbsp;i&nbsp;bet&nbsp;sth.&nbsp;was&nbsp;changed&nbsp;and&nbsp;undocumented..&nbsp;so&nbsp;i&nbsp;see&nbsp;two&nbsp;possible&nbsp;solutions:&nbsp;someone&nbsp;will&nbsp;try&nbsp;to&nbsp;suspend&nbsp;displaying&nbsp;of&nbsp;this&nbsp;message&nbsp;;]&nbsp;(i have no idea if it&#39;s possible)&nbsp;or&nbsp;someone&nbsp;with&nbsp;broader&nbsp;knowlage&nbsp;will&nbsp;go&nbsp;into&nbsp;pyqt&nbsp;or&nbsp;even&nbsp;qt&nbsp;to&nbsp;check&nbsp;if&nbsp;it&nbsp;is&nbsp;a&nbsp;bug.&nbsp;if&nbsp;it&nbsp;is&nbsp;--&nbsp;we&nbsp;may&nbsp;ask&nbsp;to&nbsp;correct&nbsp;it&nbsp;--&nbsp;if&nbsp;not&nbsp;maybe&nbsp;IPShellQt4&nbsp;can&nbsp;be&nbsp;changed&nbsp;to&nbsp;walk&nbsp;it&nbsp;around.
<br> <br>thank you all for all&nbsp;help&nbsp;(in advance)&nbsp;and&nbsp;developers&nbsp;of&nbsp;IPython&nbsp;for&nbsp;really&nbsp;nice&nbsp;shell.&nbsp;please&nbsp;don&#39;t&nbsp;leave&nbsp;the&nbsp;problem&nbsp;as&nbsp;is..&nbsp;;]<br> <br><br>bests,<br>szymon.<br><br>