then edit expression
Python:
hou.node("..").name() + '_%03d' % hou.intFrame()
hou.node("..").name() : parent name
*/ works for Integers Floats and Strings*/
'_%03d' % hou.intFrame() : pad3 decimals places using Frame as base number
****another method only for strings*****:
n = '4'
print n.zfill(3)
>>> '004'HScript:
opname("..")+"_" + padzero(3,"$F")
opname(".."): parent name
padzero(3,"$F") :pad3 decimals places using Frame as base number
