code: def test_arg_scope(self):
      myhelper = self.myhelper
      myhelper2 = self.myhelper2
      n = 15
      with brew.arg_scope([myhelper], val=n):
          res = brew.myhelper(self.model)
      self.assertEqual(n, res)
  
      with brew.arg_scope([myhelper, myhelper2], val=n):
          res1 = brew.myhelper(self.model)
          res2 = brew.myhelper2(self.model)
      self.assertEqual([n, n], [res1, res2])
  
imports: from caffe2.python import brew, core, scope, workspace
  from caffe2.python.modeling.parameter_info import ParameterTags
  from caffe2.python.model_helper import ModelHelper
  from caffe2.python.cnn import CNNModelHelper
  import unittest
  import numpy
label_desc: Use image node_id 7 for calling the BrewTest obj's underlying member method code with example usage: obj.test_arg_scope() without return types