How to use the klayout.db.DBox.new function in klayout

def rodCreateRect(name,layer,width,length,origin,elementsX=1,spaceX=0):
   print layer
   l1 = layermap[ (layer[0],layer[1]) ]
   l1 = layout.layer(l1[0], l1[1]) 
   r = db.DBox.new(origin[0],origin[1],origin[0]+width,origin[1]+length)
   top.shapes(l1).insert(r)
   return { "lL" : [origin[0],origin[1]], 
            "uL" : [origin[0],origin[1]+length],  
            'lR' : [origin[0]+width,origin[1]], 
            'uR' : [origin[0]+width,origin[1]+length],
            'lC' : [origin[0],origin[1]+length/2],
            'uC' : [origin[0]+width/2,origin[1]+length],
            'dbId' : {'pin' : None}}