______________________ test_pca_dtype_preservation[full] _______________________
svd_solver = 'full'
    @pytest.mark.parametrize('svd_solver', PCA_SOLVERS)
    def test_pca_dtype_preservation(svd_solver):
>       check_pca_float_dtype_preservation(svd_solver)
../_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pla/lib/python3.6/site-packages/sklearn/decomposition/tests/test_pca.py:515: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
svd_solver = 'full'
    def check_pca_float_dtype_preservation(svd_solver):
        # Ensure that PCA does not upscale the dtype when input is float32
        X_64 = np.random.RandomState(0).rand(1000, 4).astype(np.float64,
                                                             copy=False)
        X_32 = X_64.astype(np.float32)
    
        pca_64 = PCA(n_components=3, svd_solver=svd_solver,
                     random_state=0).fit(X_64)
        pca_32 = PCA(n_components=3, svd_solver=svd_solver,
                     random_state=0).fit(X_32)
    
        assert pca_64.components_.dtype == np.float64
        assert pca_32.components_.dtype == np.float32
        assert pca_64.transform(X_64).dtype == np.float64
        assert pca_32.transform(X_32).dtype == np.float32
    
>       assert_allclose(pca_64.components_, pca_32.components_, rtol=1e-4)
E       AssertionError: 
E       Not equal to tolerance rtol=0.0001, atol=0
E       
E       Mismatch: 16.7%
E       Max absolute difference: 1.70156909e-05
E       Max relative difference: 0.00010702
E        x: array([[ 0.620224,  0.159835, -0.38317 , -0.66555 ],
E              [ 0.263179,  0.240851,  0.908007, -0.21966 ],
E              [-0.124977, -0.881087,  0.167274, -0.424366]])
E        y: array([[ 0.620221,  0.159831, -0.383173, -0.665551],
E              [ 0.263179,  0.240834,  0.908009, -0.219671],
E              [-0.124991, -0.881089,  0.167257, -0.424363]], dtype=float32)