ZTR,OFFSET,TRF

ZOT.py

import maya.cmds as cmds
def extraControl(objs=[],nameSuf='ZTR' , nameOffset='OFS', nameTrf='TRF' , nameCNT='CNT' , rad = 14 ) :
    for obj in objs:
        print obj
        if '|' in obj:
            obj=obj.split('|')[-1]
        if '_' in obj:
            newName=obj.split(obj.split('_')[-1:][0])[0]
        else:
            newName=obj
        ztr=cmds.group(em=True,n=str(newName + '_' + nameSuf))
        pcns=cmds.parentConstraint(obj,ztr)[0]
        scns=cmds.scaleConstraint(obj,ztr)[0]
        cmds.delete(pcns,scns)
        trf = cmds.duplicate(ztr,n=str(newName + '_' + nameTrf))[0]
        off = cmds.duplicate(ztr,n=str(newName + '_' + nameOffset))[0]
        cmds.parent(off,ztr)        
        cmds.parent(trf,off)
        cmds.parent(obj,trf)


sel=cmds.ls(sl=1)
cnts=extraControl(sel)