code: def test_pipeline_shap_base_value(classifier_pipeline_explainer):
      assert isinstance(
          classifier_pipeline_explainer.shap_base_value(),
          (np.floating, float),
      )
  
imports: import pytest
  import pandas
  import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: test_pipeline_shap_base_value(classifier_pipeline_explainer) without return types