put figures in subkey

converters/transformers.py

@@ -121,13 +121,15 b' class ExtractFigureTransformer(ConfigurableTransformers):'
     def cell_transform(self, cell, other, count):
         if not self.enabled:
             return cell, other
+        if other.get('figures',None) is None :
+            other['figures']={}
         for i, out in enumerate(cell.get('outputs', [])):
             for type in self.display_data_priority:
                 if out.hasattr(type):
                     figname, key, data = self._new_figure(out[type], type, count)
                     cell.outputs[i][type] = figname
                     out['key_'+type] = figname
-                    other[key] = data
+                    other['figures'][key] = data
                     count = count+1
         return cell, other
 

runme.py

@@ -98,7 +98,7 b' class NbconvertApp(Application):'
 
         out_root = ipynb_file[:-6].replace('.','_').replace(' ','_')
 
-        keys = resources.keys()
+        keys = resources.get('figures',{}).keys()
         if self.write :
             with io.open(os.path.join(out_root+'.'+self.fileext),'w') as f:
                         f.write(output)
@@ -109,12 +109,12 b' class NbconvertApp(Application):'
                 if self.write:
                     with io.open(os.path.join(out_root+'_files',key),'wb') as f:
                         print(' writing to ',os.path.join(out_root,key))
-                        f.write(resources[key])
+                        f.write(resources['figures'][key])
             if self.stdout:
                 print('''
 ====================== Keys in Resources ==================================
 ''')
-                print(resources.keys())
+                print(resources['figures'].keys())
                 print("""
 ===========================================================================
 you are responsible from writing those data do a file in the right place if