pykdl_utils contains kdl_parser.py, for parsing URDF objects from the robot_model_py stack into PyKDL trees and chains, and kdl_kinematics.py, for wrapping KDL kinematics calls, making kinematics requests in Python far simpler. jointspace_kdl_kin.py also contains a KDLKinematics superclass which subscribes to /joint_states, automatically filling the FK and jacobian requests with the current joint angles.
pykdl_utils is ...