I am trying to use GdkPixbuf.Pixbuf.new_from_data() as shown in gtk 2.x and I am passing 7 arguments. But it gives me an error that I need to pass 9 arguments. 

What I am doing now was working for gtk2.x . So I figured out the other 2 arguments that I need to pass. 

http://developer.gimp.org/api/2.0/gdk-pixbuf/gdk-pixbuf-creating.html

http://developer.gimp.org/api/2.0/gdk-pixbuf/gdk-pixbufrefcounting.html#GdkPixbufDestroyNotify

One of the arguments is of type GdkPixbuf.PixbufDestroyNotify. I don't know how to do this. 

I am trying help(GdkPixbuf.PixbufDestroyNotfiy) in ipython but I am getting an error.

**error: NotImplementedError.**

    self.img_pixbuf = GdkPixbuf.Pixbuf.new_from_data(self.img.tostring(),
                                                    GdkPixbuf.Colorspace.RGB,
                                                    False,
                                                    self.img.depth,
                                                    self.img.width,
                                                    self.img.height,
                                                    self.img.width*self.img.nChannels)

    #Here my self.img is cv2.cv.iplimage object (OpenCV iplimage)

I am getting following error:

    /home/jay/<ipython console> in <module>()

    /usr/lib/python2.7/dist-packages/gi/module.pyc in __getattr__(self, name)
        241                 return registry[key]
        242 
    --> 243         return getattr(self._introspection_module, name)
        244 
        245     def __dir__ (self):

    /usr/lib/python2.7/dist-packages/gi/module.pyc in __getattr__(self, name)
        189             wrapper = info.get_value()
        190         else:
    --> 191             raise NotImplementedError(info)
        192 
        193         self.__dict__[name] = wrapper

    NotImplementedError: <gi.CallbackInfo object (PixbufDestroyNotify) at 0x0x8df5b6c>
