code: def test_sparse2_csr(self):
      self._fit_then_transform(sparse2_csr_1h.todense(), sparse2_csr)
  
file_path: auto-sklearn/test/test_pipeline/implementations/test_SparseOneHotEncoder.py
imports: import numpy
  import scipy.sparse
  import sklearn.datasets
  import sklearn.model_selection
  import sklearn.pipeline
  import sklearn.tree
  from sklearn.impute import SimpleImputer
  from sklearn.tree import DecisionTreeClassifier
  from autosklearn.pipeline.implementations.CategoryShift import CategoryShift
  from autosklearn.pipeline.implementations.SparseOneHotEncoder import SparseOneHotEncoder
  import unittest
label_desc: Use image node_id 3 for calling the TestSparseOneHotEncoder obj's underlying member method code with example usage: obj.test_sparse2_csr() without return types