class_docstr: Unit test Contributions Class
  TODO: Docstring
  Parameters
  ----------
  unittest : [type]
      [description]
  Returns
  -------
  [type]
      [description]
class_docstr_tok: ["Unit","test","Contributions","Class","TODO",":","Docstring","Parameters","--","--","--","--","--","unittest",":","[","type","]","[","description","]","Returns","--","--","--","-","[","type","]","[","description","]"]
docstr: Setup
docstr_tok: ["Setup"]
code: def setUp(self):
      """
      Setup
      """
      iris = load_iris()
      x_df = pd.DataFrame(data=iris.data, columns=iris.feature_names)
      y_df = pd.DataFrame(data=iris.target, columns=["target"])
      (
          self.x_train,
          self.x_test,
          self.y_train,
          self.y_test,
      ) = train_test_split(x_df, y_df, random_state=1)
  
file_path: shapash/tests/integration_tests/test_contributions_multiclass.py
imports: import unittest
  import shap
  from sklearn.datasets import load_iris
  from sklearn.model_selection import train_test_split
  from sklearn.ensemble import RandomForestClassifier
  import numpy
  import pandas
  from shapash.decomposition.contributions import rank_contributions
label_desc: Use image node_id 1 for calling the TestContributions obj's underlying member method code with example usage: obj.setUp() without return types