Show icon or color in Gtk TreeView tree

Question

I am having difficulty loading a file or displaying a colour in one of the columns of a Gtk TreeView (Python binding of GTK3). An example taken from QGIS shows a icon in the

Answer 1

Apparently all I was missing was "pixbuf = 0" indicating that the pixbuf is in the 0th column. This line of the example needs to be modified:

    px_column = Gtk.TreeViewColumn("Icon", px_renderer, pixbuf=0)