'Event handler for tab selection.
With TabbedPageSet, this calls TabbedPageSet.change_page, so that
selecting a tab changes the page.
Note that this does -not- call set_selected -- it will be called by
TabSet.set_selected_tab, which should be called when whatever the
tabs are related to changes.'

def _select_event(self, *args):

    self.select_command(self.name)
    return
