code: def test_num_hidden_layers():
      assert_raises(
          AttributeError,
          "Currently, only 1 hidden layer is supported",
          MLP,
          20,
          0.05,
          [25, 10],
      )
  
file_path: mlxtend/mlxtend/classifier/tests/test_multilayerperceptron.py
imports: import numpy
  from sklearn.base import clone
  from mlxtend.classifier import MultiLayerPerceptron
  from mlxtend.data import iris_data
  from mlxtend.utils import assert_raises
label_desc: Use image node_id 8 for calling a global function with example usage: test_num_hidden_layers() without return types