e.obj2 in collisions

[Andrey]

Sorry for the puzzle. So I have a number of objects (balls) described in the script as the list segmSet[]. Each object was generated as the instance of class. While colliding with a hand moving pointer object (which is e.obj1) such a ball (which is e.obj2) should change the color to orange and class variable segmSet[].selected associated with this object should be changed. No problem with color:

e.obj2.color(viz.ORANGE)

but if I try something like

if e.obj2 in segmSet:
. . .

to change segmSet[].selected, it does not work.