code: def kinetic_grad(p):
      return p
  
imports: import logging
  from collections import namedtuple
  import pytest
  import torch
  from pyro.ops.integrator import velocity_verlet
  from tests.common import assert_equal
label_desc: Use image node_id 1 for calling the HarmonicOscillator obj's underlying member method code with example usage: obj.kinetic_grad(p) and returns: p