gtk.GenericCellRenderer — a TreeView cell renderer that helps create cell renderers in Python
The gtk.GenericCellRenderer 
helps in the creation of gtk.TreeView cell
renderers in Python. The gtk.GenericCellRenderer 
is subclassed to provide a new cell renderer that provides cell renderer
behavior using methods with predefined names that are called by the gtk.GenericCellRenderer 
methods as required to provide the various cell renderer operations. The
methods that need to be defined by the programmer in Python are:
    def on_get_size(widget, cell_area)    def on_render(window, widget, background_area, cell_area, expose_area, flags)    def on_activate(event, widget, path, background_area, cell_area, flags)    def on_start_editing(event, widget, path, background_area, cell_area, flags)See the gtk.CellRenderer 
description for details of the above methods.
    gtk.GenericCellRenderer()| Returns : | a new gtk.GenericCellRendererobject | 
Creates a new gtk.GenericCellRenderer