code: def setUp(self):
      super(MixtureOfExpertsTestCase, self).setUp()
      self.networks = [
          layers.Input(1),
          layers.join(
              layers.Input(1), layers.Sigmoid(20), layers.Sigmoid(1)
          ),
      ]
  
file_path: neupy/tests/architectures/test_mixtures_of_experts.py
imports: import copy
  import numpy
  from sklearn import datasets, preprocessing, model_selection
  from neupy.utils import asfloat
  from neupy.exceptions import LayerConnectionError
  from neupy.algorithms.gd import objectives
  from neupy import algorithms, layers, architectures
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the MixtureOfExpertsTestCase obj's underlying member method code with example usage: obj.setUp() without return types