code: def setUp(self):
      super(BaseTestCase, self).setUp()
      self.data, _ = make_blobs(
          n_samples=1000,
          n_features=2,
          centers=2,
          cluster_std=0.4,
          random_state=0,
      )
  
file_path: neupy/tests/algorithms/competitive/test_growing_neural_gas.py
imports: import pickle
  import numpy
  import matplotlib.pyplot
  from sklearn.datasets import make_blobs
  from neupy import algorithms
  from neupy.algorithms.competitive.growing_neural_gas import NeuralGasGraph, NeuronNode
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the GrowingNeuralGasTestCase obj's underlying member method code with example usage: obj.setUp() without return types