callback script

[Hello world]

I want to add and delete a node when I select a toggle.I think this could be done in the call back script in type parameters.

the given below is the code I ve tried

hp=hou.node('/obj').createNode('shopnet','test') 
test1=hou.ToggleParmTemplate('a','test1t',1) 
hp.addSpareParmTuple(test1,('General test',),True) 

toout=hou.node('out').createNode('shopnet','test1') 
test2=hou.ToggleParmTemplate('b','test2',1) 
toout.addSpareParmTuple(test2,('General test',),True) 
test2t=hou.node('out/test1/') 
test2t.parm('b').setExpression('ch("/obj/test/a")') 

if(test2t.evalParm('b')==1): 
tout1=hou.node('out').createNode('ifd','mantraworking') 
else: 
tout11=hou.node('/out/mantraworking') 
tou1=hou.node('obj/mantraworking') 
tou1.destroy()

for some reason it doesnt work.do i need to type all these code in the call back script field?

could anyone please correct me.

thank you

[Hello world]

still getting problems

[kubabuk]

at the first glance your if/else indentations are messed up