There is a Treeview with several TreeViewColumns. Because the default font-size is to big for my usage, I need to set the font-size in the TreeViewColumn Header.
I tried to following:
tvc = Gtk.TreeViewColumn()
tvcl = Gtk.Label("Test")
tvc.set_widget(tvcl)
But the Header of the Column is empty then. If it's possible to change the font of the TreeViewColumn().title, this would be enaugh.