This command will return a <node3D> object if one is actively displaying a tooltip.
import viz
viz.go()
viz.add('tut_ground.wrl')
ball = viz.add('ball.wrl',pos=(0,1,5))
ball.tooltip = 'Hit the spacebar'
#Create a tool tip object
import viztip
tip = viztip.ToolTip()
spin = vizact.spin(0,1,0,45)
def spinBall():
if tip.getNode() == ball:
ball.addAction(spin)
vizact.onkeydown(' ',spinBall)