code: def energy(q, p):
      return (
          0.5 * p["x"] ** 2
          + 0.5 * p["y"] ** 2
          - 1.0 / torch.pow(q["x"] ** 2 + q["y"] ** 2, 0.5)
      )
  
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 2 for calling the CircularPlanetaryMotion obj's underlying member method code with example usage: obj.energy(q, p) and returns: unknown