class_docstr: Test ACAR-NET Backbone
code: def test_slowfast152(self):
      model = acar_net.backbone("slowfast152", alpha=4, beta=0.125)
      out = model(self.data)
      self.assertEqual(len(out), 2)
      self.assertEqual(out[0].shape, (1, 2048, 2, 1, 1))
      self.assertEqual(out[1].shape, (1, 256, 8, 1, 1))
  
file_path: towhee/tests/unittests/models/acar_net/test_backbone.py
imports: import unittest
  import torch
  from towhee.models import acar_net
label_desc: Use image node_id 3 for calling the TestBackbone obj's underlying member method code with example usage: obj.test_slowfast152() without return types