Thanks Ben, that solved my issue. I guess I got thrown off because the plot stayed open, as you described. It's hard to troubleshoot when you don't get any errors. In the future I will attach all of my objects. -Mark
On Fri, Sep 7, 2012 at 12:03 PM, Benjamin Root <ben.r...@ou.edu> wrote: > I think I see your problem... see below: > > > class start_lasso(): > def __init__(self): > data = [Datum(*xy) for xy in rand(100, 2)] > > fig = figure() > ax = fig.add_subplot(111, xlim=(0,1), ylim=(0,1), > autoscale_on=False) > lman = LassoManager(ax, data) > show() > > You aren't saving any of the objects created in the "start_lasso" class to > your start_lasso object. Luckily, with the way pyplot works, the figure > object your create gets implicitly saved to the "pyplot state manager" (a > sort of smart global location for the figure objects), and the axes object > gets implicitly attached to the figure object. Therefore, when the python > execution goes out of this scope, the figure object and the axes do not get > garbage-collected. However, the lasso widget that gets created and all the > callbacks that were attached are all done with weak references to the figure > and axes. So when you leave this scope, the LassoManager no longer exists > and the callback fails to execute (as designed). > > So, make sure that at least lman (and possibly fig and ax) gets saved to the > start_lasso object to solve that part of the problem. Next, you don't save > the start_lasso object your create anywhere, so even if you saved lman to > start_lasso, the start_lasso object gets garbage-collected anyway as a > temporary. > > I hope this is clear. Let me know if you still have more issues. > > Cheers! > Ben Root > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
