On Thu, Mar 1, 2012 at 10:59 AM, Jean-Baptiste Marquette <marqu...@iap.fr>wrote:
> Dear Python gurus,
>
> I have written the attached script to plot data from SAMP interaction with
> TOPCAT (http://www.star.bris.ac.uk/~mbt/topcat/).
> I select a row on a given table (VOtable format) in TOPCAT, got the message
>
> Selected : file:/Volumes/pepperland/erosdata/cc_all/tm_all.vot 18
> Plotting star tm5000k7768
>
> All I obtain on screen is a blank rectangle window without borders and the
> rainbow wheel. I sampled the python process, file attached as well.
> I updated PyQt4 using the latest Mac snapshot and the Qt 4.8 libraries.
>
> Any hint welcome, thanks.
>
> Cheers,
> Jean-Baptiste Marquette
>
>
Jean,
You have several possible sources of problems here. I would first make
sure that basic matplotlib scripts work using the Qt4Agg backend on your
computer. Test out some regular scripts from the examples section of the
documentation. If they work as expected, then it is probably more likely
that there is a problem with one of the other libraries. Another possible
source of trouble may lie with the calls to "sleep". Because the display
libraries are not on a separate process, the sleep could also prevent the
figures from being completely rendered.
Personally, I wouldn't even bother with the interactive mode. Keep it off,
and just put the cleanup code after "plt.show()", which is a blocking
call. There is no need to implement your own event loop.
Ben Root
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