python - How to prevent incorrect exit from QTapplication when running from within Spyder -

-

this question related code shown here

an more down-to-the-point code this:

import sys import os pyqt4 import qtgui   class window(qtgui.qdialog):      def __init__(self, parent=none):         super(window, self).__init__(parent)          # button mess around         self.button= qtgui.qpushbutton('push me')          # set layout         layout = qtgui.qvboxlayout()         layout.addwidget(self.button)         self.setlayout(layout)   if __name__ == '__main__':     app = qtgui.qapplication(sys.argv)      main = window()     main.show()      sys.exit(app.exec_())

when run this, silly one-button window appears, nothing :-) still, when close it, following complaint ipython console:

an exception has occurred, use %tb see full traceback.

to exit: use 'exit', 'quit', or ctrl-d. exception has occurred, use %tb see full traceback.  systemexit: 0   in [3]: %tb traceback (most recent call last):    file "<ipython-input-2-0a8f6cad0df5>", line 1, in <module>     runfile('c:/users/my_username/appdata/local/continuum/anaconda3/lib/site-packages/pyqt4/se2.py', wdir='c:/users/mtk10531/appdata/local/continuum/anaconda3/lib/site-packages/pyqt4')    file "c:\users\my_username\appdata\local\continuum\anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 682, in runfile     execfile(filename, namespace)    file "c:\users\my_username\appdata\local\continuum\anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 85, in execfile     exec(compile(open(filename, 'rb').read(), filename, 'exec'), namespace)    file "c:/users/my_username/appdata/local/continuum/anaconda3/lib/site-packages/pyqt4/se2.py", line 39, in <module>     sys.exit(app.exec_())  systemexit: 0

then, running again produces following:

it seems kernel died unexpectedly. use 'restart kernel' continue using console. seems kernel died unexpectedly. use 'restart kernel' continue using console. seems kernel died unexpectedly. use 'restart kernel' continue using console.

i found other posts complaining similar things, here , here

i have tried implement understood (not much) answers, namely:

  • to pass name of script qapplication: app = qtgui.qapplication(['my_file.py']) had no effect

  • to strip app = qtgui.qapplication(['my_file.py']) main(), in case kernel dies before doing else...

any hint?

cheers, michele

p.s. - looking @ wavy pattern of \ , / in traceback makes me sick!


Comments

Post a Comment

Popular posts from this blog

yii2 - Yii 2 Running a Cron in the basic template -

-
i have seen instructions on running cron in advanced template, cant figure out how on basic template. have following controller in basic controllers folder. <?php namespace app\controllers; use yii\console\controller; /** * cron controller */ class croncontroller extends controller { public function actionindex() { echo "cron service runnning"; } public function actionmail($to) { echo "sending mail " . $to; } } i have navigated root of application , tried these comands yii cron php yii cron im getting unknown comand "cron" i know old question failed find actual answer this. if @ code yii exec file you'll notice requires /common/config/aliases.php file console/config/main.php. can naturally change these or copy on these advanced template. hope solves problem wanting same thing.
Read more

asp.net - 'System.Web.HttpContext' does not contain a definition for 'GetOwinContext' Mystery -

-
i realize question might seem trivial some, it's these types of things find myself fighting quite bit , want make sense of despite seeming losing battle in .net (for me anyway). so, if following: using system.web; ... applicationuser user = system.web.httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); that produces error in title , red getowincontext() , error cannot resolve symbol 'getowincontext()' however, if following (remove system.web in front of httpcontext ), works expected (or @ least no errors): using system.web; ... applicationuser user = httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); however, if (same line that's working using system.web commented out): //using system.web; ... applicationuser user = httpcontext.getowincontext().getusermana...
Read more

mercurial graft feature, can it copy? -

-
there new feature in mercurial 3, called 'graft' (graft local). job of moving change-set different branch. is there way "copy" change-set branch? i interested in in moving stuff qa branch production branch, still need code reside in qa. want copy. found , have tried few things, maybe it'll become clear more tinkering , reading... does have better way of 'cherry picking' change-sets move cross branch (or trunk)??? graft copies changesets, doesn't move them. hg graft (emphasis mine): this command uses mercurial's merge logic copy individual changes other branches without merging branches in history graph. known 'backporting' or 'cherry-picking' . default, graft copy user, date, , description source changesets.
Read more