You can disable any control with the enabled property:
mywin['notebook']['tab0']['panel']['opt1'].enabled = False
To hide it, use the visible property:
mywin['notebook']['tab0']['panel']['opt1'].visible = False
To hide it when option 3 is clicked:
def option_clicked(evt):
mywin['notebook']['tab0']['panel']['opt1'].visible = False
mywin['notebook']['tab0']['panel']['opt3'].onclick = option_clicked
Hope it helps,
Best regards
Mariano Reingart
http://www.sistemasagiles.com.ar
http://reingart.blogspot.com