Taro Sato-4 wrote: > > Hello. I'm trying to embed mpl in an wxpython app which is intended > to run repeatedly within a single script. (It's a workaround for not > being able to use pyplot.show() more than once in a script.) > > All seems to work as intended when I don't attach any key press events > (here to just destroy the app) to canvas, but when I do, as in the > script below, for some reason I keep getting errors that appear to > indicate that some remnant of the zombie of the previous app instance > may be sticking around when they shouldn't exist. Both the script in > question and the (typical) error message are shown below in this > message. > >
I think I figured out what causes wx._core.PyDeadObjectError above. In backend_bases.py, LocationEvent class has the attribute lastevent (initially set to None) which keeps the Event instance of a previous event. LocationEvent._update_enter_leave() method processes axes_leave_event for lastevent if not None, and then processes axes_enter_event for the current event. When an application window first gets created, lastevent is set to None. When the application is destroyed and a new instance of the application is created, lastevent needs to be reset to None, which apparently is not happening. The reference to the previous event which occurred within the destroyed application is being accessed via lastevent, hence the PyDeadObjectError. I'm not sure what the best timing is to rest lastevent (I'm not thoroughly familiar with mpl source codes). But modifying LocationEvent._update_enter_leave() such that the PyDeadObjectError exception raised by accessing lastevent solves the specific issue in the original post. Should I file a bug report on this? Cheers, Taro -- View this message in context: http://old.nabble.com/Strange-event-errors-with-WXAgg-%2B-wx-tp26312977p26355887.html Sent from the matplotlib - users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
