File:kaa_widgets.py----------------------------------------------------#SEE : http://unpythonic.blogspot.com/2007/03/custom-pygtk-widgets-in-glade3.htmlimport gtkclass SearchPanel(gtk.ScrolledWindow): passprint 'IS IMPORTED'File:kaa_widgets.xml----------------------<glade-catalog name="kaa_widgets" library="kaa_widgets" domain="glade-3" depends="gtk+" language="python"> <glade-widget-classes> <glade-widget-class title="Search Panel" name="SearchPanel" /> </glade-widget-classes> <glade-widget-group name="kaa_widgets" title="kaa_widgets"> <glade-widget-class-ref name="SearchPanel"/> </glade-widget-group></glade-catalog>--Result of starting glade-3 -------------** (glade-3:16537): WARNING **: Unable to load icon for GtkMenuShell (Failed to open file '/usr/share/glade3/pixmaps/22x22/menushell.png': No such file or directory)** (glade-3:16537): WARNING **: Unable to load icon for GtkMenuShell (Failed to open file '/usr/share/glade3/pixmaps/16x16/menushell.png': No such file or directory)IS IMPORTED** (glade-3:16537): WARNING **: We could not find the symbol "search_panel_get_type"** (glade-3:16537): WARNING **: Could not get the type from "SearchPanel"** (glade-3:16537): WARNING **: Failed to load the GType for 'SearchPanel'** (glade-3:16537): WARNING **: Tried to include undefined widget class 'SearchPanel' in a widget group** Message: No DevHelp installed on your system, devhelp feature will be disabled.