how i can add particle Dynamic attribute? like radiusPP,parentU,parentV.

thanks

imitating the commands when one adds per particle attrs through the UI:

import maya.cmds as cmds
cmds.addAttr("|particle1|particleShape1", ln = “radiusPP”, dt = “doubleArray” )
cmds.addAttr("|particle1|particleShape1", ln = “radiusPPO”, dt = “doubleArray” )