MNT Minor code refactoring in utils.testing (#12688)

sklearn/utils/testing.py

@@ -42,12 +42,21 @@
 except NameError:
     WindowsError = None
 
+from numpy.testing import assert_allclose
+from numpy.testing import assert_almost_equal
+from numpy.testing import assert_approx_equal
+from numpy.testing import assert_array_equal
+from numpy.testing import assert_array_almost_equal
+from numpy.testing import assert_array_less
+import numpy as np
+
 import sklearn
-from sklearn.base import BaseEstimator
+from sklearn.base import (BaseEstimator, ClassifierMixin, ClusterMixin,
+                          RegressorMixin, TransformerMixin)
+from sklearn.utils import deprecated, IS_PYPY, _IS_32BIT
 from sklearn.utils._joblib import joblib
+from sklearn.utils._unittest_backport import TestCase
 from sklearn.utils.fixes import signature
-from sklearn.utils import deprecated, IS_PYPY, _IS_32BIT
-
 
 additional_names_in_all = []
 try:
@@ -73,24 +82,13 @@
 except ImportError:
     pass
 
-from numpy.testing import assert_almost_equal
-from numpy.testing import assert_array_equal
-from numpy.testing import assert_array_almost_equal
-from numpy.testing import assert_array_less
-from numpy.testing import assert_approx_equal
-import numpy as np
-
-from sklearn.base import (ClassifierMixin, RegressorMixin, TransformerMixin,
-                          ClusterMixin)
-from sklearn.utils._unittest_backport import TestCase
-
 __all__ = ["assert_equal", "assert_not_equal", "assert_raises",
            "assert_raises_regexp", "assert_true",
            "assert_false", "assert_almost_equal", "assert_array_equal",
            "assert_array_almost_equal", "assert_array_less",
            "assert_less", "assert_less_equal",
            "assert_greater", "assert_greater_equal",
-           "assert_approx_equal", "SkipTest"]
+           "assert_approx_equal", "assert_allclose", "SkipTest"]
 __all__.extend(additional_names_in_all)
 
 _dummy = TestCase('__init__')
@@ -379,11 +377,6 @@ def __exit__(self, *exc_info):
         clean_warning_registry()
 
 
-assert_less = _dummy.assertLess
-assert_greater = _dummy.assertGreater
-
-assert_allclose = np.testing.assert_allclose
-
 def assert_raise_message(exceptions, message, function, *args, **kwargs):
     """Helper function to test the message raised in an exception.