code: def assertSimilar(self, a, b, ref, msg=None, tol=TOLERANCE):
      self.assertLessEqual(delta(a, b, ref), tol, msg)
  
imports: import random
  import unittest
  import torch
  from julius.core import pure_tone
  from julius import filters
label_desc: Use image node_id 1 for calling the _BaseTest obj's underlying member method code with example usage: obj.assertSimilar(a, b, ref, msg, tol) without return types