code: def test_source(self):
      module = functions.import_string_code_as_module(
          metricsetting.median_absolute_error["source"]
      )
  
      assert (
          np.round(
              module.metric_generator(regression_y, regression_preds), 2
          )
          == 3.72
      )
  
      del module
  
imports: from __future__ import absolute_import, print_function, division, unicode_literals
  import unittest
  import numpy
  from sklearn.datasets import load_iris, load_breast_cancer, load_boston
  from sklearn.linear_model import LogisticRegression, LinearRegression
  from sklearn.model_selection import cross_val_predict
  from xcessiv import functions
  from xcessiv.presets import metricsetting
label_desc: Use image node_id 1 for calling the TestMedianAbsoluteError obj's underlying member method code with example usage: obj.test_source() without return types