code: def setUp(self):
      super(OptimizersTestCase, self).setUp()
      self.network = layers.join(
          layers.Input(10),
          layers.Sigmoid(20),
          layers.Sigmoid(1),
      )
  
file_path: neupy/tests/algorithms/gd/test_optimizers.py
imports: from functools import partial
  from neupy import algorithms, layers
  from helpers import simple_classification, compare_networks
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the OptimizersTestCase obj's underlying member method code with example usage: obj.setUp() without return types