code: def test_bad_shape():
      ft_clf = FirstColFtClassifier()
      with pytest.raises(ValueError):
          ft_clf.fit([7], [0])
      with pytest.raises(ValueError):
          ft_clf.fit([[7]], [[0]])
  
imports: import pytest
  import pandas
  from sklearn.model_selection import cross_val_score
  from skift import FirstColFtClassifier, IdxBasedFtClassifier, ColLblBasedFtClassifier, FirstObjFtClassifier, SeriesFtClassifier
label_desc: Use image node_id 4 for calling a global function with example usage: test_bad_shape() without return types