Python - How can I get an image from a wxRichTextCtrl ?

# !/usr/bin/python
# -*- coding:Latin-1 -*-

import wx
import wx.richtext as rt

    
class Fentre_prin(wx.Frame):
    def __init__(self, parent, title): 
        wx.Frame.__init__(self, parent, -1, title,size=(800,600))
	### Menu :
	self.MyMenu()
	### Scroll window :
	ma_scroll_window = wx.ScrolledWindow(self)
	ma_scroll_window.SetBackgroundColour(wx.WHITE)
	ma_scroll_window.SetScrollbars(20, 20, 55, 40)
	### button :
        b1 = wx.Button(ma_scroll_window, -1, u"Get the selected text")
        self.Bind(wx.EVT_BUTTON, self.clipboard1, b1)
	b2 = wx.Button(ma_scroll_window, -1, u"Get the selected image")
        self.Bind(wx.EVT_BUTTON, self.clipboard2, b2)
	
	### richtext :
	self.ma_RichText= rt.RichTextCtrl(ma_scroll_window, -1, "",size=(700,400))
	self.ma_RichText.WriteText('Hello ')
		
	###  Image :
	image1=wx.Image("chien.jpg")
	self.ma_RichText.WriteImage(image1)
	
	self.ma_RichText.Layout()
	
	# Création du sizer et positionnement des wigets :
	sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(b1, 0, wx.ALL, 5)
	sizer.Add(b2, 0, wx.ALL, 5)
	sizer.Add(self.ma_RichText, 0, wx.ALL, 5)
       	# Le sizer est lié au conteneur :
        ma_scroll_window.SetSizer(sizer)
        ma_scroll_window.Layout()
	
	
    	
    def MyMenu(self):
	def doBind(item, handler, updateUI=None):
	    self.Bind(wx.EVT_MENU, handler, item)
	    if updateUI is not None:
		self.Bind(wx.EVT_UPDATE_UI, updateUI, item)
		
	### Menu Edition :
	menuEdition = wx.Menu()
	doBind( menuEdition.Append(wx.ID_CUT, "Couper\tCtrl+X"),
		self.suivi_des_evenements, self.suivi_des_evenements )
	doBind( menuEdition.Append(wx.ID_COPY, "&Copier\tCtrl+C"),
		self.suivi_des_evenements, self.suivi_des_evenements)
	doBind( menuEdition.Append(wx.ID_PASTE, "&Coller\tCtrl+V"),
		self.suivi_des_evenements, self.suivi_des_evenements)
		
	### Titres des menus
	BarreTitreDesMenus= wx.MenuBar()
	BarreTitreDesMenus.Append(menuEdition, "&Edition")
	self.SetMenuBar(BarreTitreDesMenus)
	
    def suivi_des_evenements(self, evt):
	self.ma_RichText.ProcessEvent(evt)

    def clipboard1(self, evt):
        print'---- clipboard1() ----'
	wx.TheClipboard.Open()
	data=wx.TextDataObject()
	wx.TheClipboard.GetData(data)
	wx.TheClipboard.Close()
	texte=data.GetText()
	print'texte : ',texte
	self.ma_RichText.WriteText(texte)
	print'Le contenu est de type :',type(texte) ###  <type 'unicode'>
	
    def clipboard2(self, evt):
	print' -------- clipboard2() -------'
	### L'image est lu depuis le presse-papier :	
	data=wx.BitmapDataObject()
	print'data :',data ###  <wx._misc.BitmapDataObject; proxy of <Swig Object of type 'wxBitmapDataObject *' at 0x1dda1e0> >
	wx.TheClipboard.GetData(data) 
	wx.TheClipboard.Close()
	contenu=data.GetBitmap()
	print'contenu :',contenu ### <wx._gdi.Bitmap; proxy of <Swig Object of type 'wxBitmap *' at 0x1c94c28> >
	
	
	imageBMP=data.GetBitmap()                ### <class 'wx._gdi.Bitmap'>
	print'imageBMP :',imageBMP  ### <wx._gdi.Bitmap; proxy of <Swig Object of type 'wxBitmap *' at 0x1c91e28> >
	print'Width of the bitmap :', imageBMP.GetWidth()
	print'True if bitmap data is present :', imageBMP.IsOk()
	imageBMP.SetHeight(50)
	
	#imageIMG=imageBMP.ConvertToImage()
	


class MyApp(wx.App):
    def OnInit(self):
        frame = Fentre_prin(None, u"Début")
        self.SetTopWindow(frame)
        frame.Show(True)
        return True

try:
	app = MyApp()

except:
	app = MyApp(redirect=True)

app.MainLoop()