code: def test_linreg_shap_base_value(
      precalculated_linear_regression_explainer,
  ):
      assert isinstance(
          precalculated_linear_regression_explainer.shap_base_value(),
          (np.floating, float),
      )
  
imports: import pytest
  import pandas
  import numpy
  import shap
  import plotly.graph_objects
label_desc: Use image node_id 11 for calling a global function with example usage: test_linreg_shap_base_value(precalculated_linear_regression_explainer) without return types