code: def test_sparse_encode(self):
      iris = datasets.load_iris()
      df = pdml.ModelFrame(iris)
  
      _, dictionary, _ = decomposition.dict_learning(
          iris.data, 2, 1, random_state=self.random_state
      )
  
      result = df.decomposition.sparse_encode(dictionary)
      expected = decomposition.sparse_encode(iris.data, dictionary)
      self.assertIsInstance(result, pdml.ModelFrame)
      tm.assert_index_equal(result.index, df.data.index)
      self.assert_numpy_array_almost_equal(result.values, expected)
  
file_path: pandas-ml/pandas_ml/skaccessors/test/test_decomposition.py
imports: import pytest
  import sklearn.datasets
  import sklearn.decomposition
  import pandas_ml
  import pandas_ml.util.testing
label_desc: Use image node_id 5 for calling the TestDecomposition obj's underlying member method code with example usage: obj.test_sparse_encode() without return types