matplotlib-devel Mailing List for matplotlib

hi
i use python 2.5.1, wx-2.8-msw-unicode and matplotlib-0.91.1.win32-py2.5 
package. the problem is that the wx.FileDialog return with an unicode 
string and the "self.get_renderer()._renderer.write_png()" will throw an 
exception: "TypeError: cannot return std::string from Unicode object"
stack trace:
 self.app.MainLoop()
File "Python25\Lib\site-packages\wx-2.8-msw-unicode\wx\_core.py", line 
7865, in MainLoop
 wx.PyApp.MainLoop(self)
File "Python25\Lib\site-packages\wx-2.8-msw-unicode\wx\_core.py", line 
7226, in MainLoop
 return _core_.PyApp_MainLoop(*args, **kwargs)
File "Python25\Lib\site-packages\matplotlib\backends\backend_wx.py", 
line 1699, in save
 os.path.join(dirname, filename), format=format)
File "Python25\Lib\site-packages\matplotlib\backends\backend_wxagg.py", 
line 101, in print_figure
 FigureCanvasAgg.print_figure(self, filename, *args, **kwargs)
File "Python25\Lib\site-packages\matplotlib\backend_bases.py", line 
1196, in print_figure
 **kwargs)
File "Python25\Lib\site-packages\matplotlib\backends\backend_agg.py", 
line 419, in print_png
 self.get_renderer()._renderer.write_png(filename, self.figure.dpi.get())
i think in print_png we must use "str(filename)" as we do it in 
print_raw, not "filename".