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

def rodCreateRectBase(layer,width,length,origin=[0,0],elementsX=1,spaceX=0,termIOType=None,termName=None,pin=None,cvId=None,beginOffset=0,endOffset=0,space=0):
   r = None
   l1 = maplayer(layer)
   if l1 >= 0:
      print("found layer")
      r = db.DBox.new(origin[0],origin[1],origin[0]+width,origin[1]+length).to_itype(0.001)
      r = top.shapes(l1).insert(r)
   return createObj(subs=[r])

def dbCreateRect(name,layer,coord):
   l1 = layermap[ (layer[0],layer[1]) ]
   l1 = layout.layer(l1[0], l1[1]) 
   r = db.DBox.new(coord[0][0],coord[0][1],coord[1][0],coord[1][1])
   top.shapes(l1).insert(r)