Use absolute imports in test_ETS

Author: jessegrabowski

tests/statespace/test_ETS.py

@@ -6,9 +6,9 @@
 from numpy.testing import assert_allclose
 from pytensor.graph.basic import explicit_graph_inputs
 from scipy import linalg
-from statespace.utils.constants import LONG_MATRIX_NAMES
 
 from pymc_experimental.statespace.models.ETS import BayesianETS
+from pymc_experimental.statespace.utils.constants import LONG_MATRIX_NAMES
 from tests.statespace.utilities.shared_fixtures import rng
 from tests.statespace.utilities.test_helpers import load_nile_test_data