old_contents: from robotsim import *
  import atexit
  atexit.register(destroy)
  
  __all__ = ['WorldModel','RobotModel','RobotModelLink','RigidObjectModel','TerrainModel','Mass','ContactParameters',
             'SimRobotController','SimRobotSensor','SimBody','Simulator',
             'Geometry3D','Appearance','DistanceQuerySettings','DistanceQueryResult','TriangleMesh','PointCloud','GeometricPrimitive','VolumeGrid',
             'IKObjective','IKSolver','GeneralizedIKObjective','GeneralizedIKSolver',
             'model','math','io','plan','sim']
  
  
  
new_contents: from __future__ import print_function,division
  from robotsim import *
  import atexit
  atexit.register(destroy)
  
  __all__ = ['WorldModel','RobotModel','RobotModelLink','RigidObjectModel','TerrainModel','Mass','ContactParameters',
             'SimRobotController','SimRobotSensor','SimBody','Simulator',
             'Geometry3D','Appearance','DistanceQuerySettings','DistanceQueryResult','TriangleMesh','PointCloud','GeometricPrimitive','VolumeGrid',
             'IKObjective','IKSolver','GeneralizedIKObjective','GeneralizedIKSolver',
             'model','math','io','plan','sim']
  
  
  
subject: Allow some compatibility between python2 and updated python 3 files