layoutAnnotationList = []
for  k,p in pos.items():
    x = p[0]
    y = p[1]
    try:
        text = G.node[k]['hostname']
    except:
        text = k
    layoutAnnotationList.append( { 'x':x, 'y':y, 'text':text } )

layout = { 'annotations': layoutAnnotationList }

layout = { 'annotations': layoutAnnotationList, 'updatemenus':layoutButtons }