pykdl urdf to kdl tree

Dear All,

Is there any way that I can convert urdf to kdl tree using pykdl ?

On searching I could find but it expects module named Tree in pykdl which seems to missing ?
 The code has :

import PyKDL as kdl

tree = kdl.Tree(root) <--

Do I have to apply some patch or am I am doing something wrong ?

Best Regards