code: def test_Covariance(self, algo):
      iris = datasets.load_iris()
      df = pdml.ModelFrame(iris)
  
      mod1 = getattr(df.covariance, algo)()
      mod2 = getattr(covariance, algo)()
  
      df.fit(mod1)
      mod2.fit(iris.data)
  
      self.assert_numpy_array_almost_equal(
          mod1.covariance_, mod2.covariance_
      )
  
file_path: pandas-ml/pandas_ml/skaccessors/test/test_covariance.py
imports: import pytest
  import sklearn.datasets
  import sklearn.covariance
  import pandas_ml
  import pandas_ml.util.testing
label_desc: Use image node_id 5 for calling the TestCovariance obj's underlying member method code with example usage: obj.test_Covariance(algo) without return types