code: def setUpClass(cls):
      cls.data_x = np.random.random([100, 1]).astype(np.float32)
      cls.data_y = (
          cls.data_x**3
          + np.random.random() * cls.data_x**2
          + np.random.random() * cls.data_x
      )
  
file_path: TensorLayer/tests/layers/test_layers_lambda.py
imports: import os
  import unittest
  import numpy
  import tensorflow
  import tensorlayer
  from tests.utils import CustomTestCase
label_desc: Use image node_id 1 for calling the Layer_Lambda_Test obj's underlying member method code with example usage: obj.setUpClass(cls) without return types