OK, I found the answer myself. It appears that multiple calls to show() are at the moment officially unsupported, although they do work for some backends on some platforms (see e.g. http://matplotlib.sourceforge.net/faq/howto_faq.html#use-show ). In particular, I have found that:
- With Qt4Agg they work under Windows (where Qt4Agg is the default backend, at least in the Python(X,Y) distribution) but under Linux they result in an "Underlying C/C++ object has been deleted" error at line 64 of backend_qt4.py - With TkAgg they fail silently under Linux (where TkAgg is the default backend, and under Windows they cause a "Fatal Python error: PyEval_RestoreThread: NULL tstate" exception - with GTKAgg, not available in my Windows installation, they work well under Linux, apart from a deprecation warning on the use of GTK.Tooltips() instead of the new GTK.Tooltip() Considering that multiple show() functionality is important for many users (see e.g. http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg13099.html ) I'd like to ask the backend developers to try their best and support this feature on as many platforms as possible. Enzo ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
