code: def test_model(self):
      w, p, p, b, v = nplr(measure="legs", n=2)
      self.assertEqual(p.shape, (1, 1))
      self.assertEqual(v.shape, (2, 1))
  
imports: import unittest
  import torch
  from towhee.models.vis4mer.utils import nplr
label_desc: Use image node_id 1 for calling the NPLRTest obj's underlying member method code with example usage: obj.test_model() without return types