code: def test_shap_base_value(skorch_classifier_explainer):
      assert isinstance(
          skorch_classifier_explainer.shap_base_value(),
          (np.floating, float),
      )
  
imports: import pytest
  import numpy
  import pandas
  from sklearn.datasets import make_classification, make_regression
  from torch import nn
  from skorch import NeuralNetClassifier, NeuralNetRegressor
  from explainerdashboard.explainers import RegressionExplainer, ClassifierExplainer
label_desc: Use image node_id 16 for calling a global function with example usage: test_shap_base_value(skorch_classifier_explainer) without return types