Fix imports

Signed-off-by: Beat Buesser <[email protected]>

Author: beat-buesser

art/estimators/classification/tensorflow.py

@@ -28,9 +28,8 @@
 import numpy as np
 import six
 
-from art.estimators.classification.classifier import ClassGradientsMixin, ClassifierMixin
 from art.estimators.tensorflow import TensorFlowV2Estimator
-from art.utils import check_and_transform_label_format
+from art.estimators.classification.classifier import ClassGradientsMixin, ClassifierMixin
 
 if TYPE_CHECKING:
 
@@ -224,6 +223,7 @@ def fit(
                        epoch to adjust the learning rate.
         """
         import tensorflow as tf
+        from art.utils import check_and_transform_label_format
 
         if self._train_step is None:  # pragma: no cover
             if self._loss_object is None:  # pragma: no cover
@@ -449,6 +449,7 @@ def compute_loss(
         :return: Array of losses of the same shape as `x`.
         """
         import tensorflow as tf
+        from art.utils import check_and_transform_label_format
 
         if self._loss_object is None:  # pragma: no cover
             raise TypeError("The loss function `loss_object` is required for computing losses, but it is not defined.")

art/estimators/estimator.py

@@ -26,8 +26,6 @@
 import numpy as np
 from tqdm.auto import trange
 
-from art.config import ART_NUMPY_DTYPE
-
 if TYPE_CHECKING:
     # pylint: disable=cyclic-import
     from art.utils import CLIP_VALUES_TYPE, PREPROCESSING_TYPE, ESTIMATOR_TYPE
@@ -192,6 +190,7 @@ def clone_for_refitting(self) -> "ESTIMATOR_TYPE":
         raise NotImplementedError
 
     def _check_params(self) -> None:
+        from art.config import ART_NUMPY_DTYPE
         from art.defences.postprocessor.postprocessor import Postprocessor
         from art.defences.preprocessor.preprocessor import Preprocessor
 

art/estimators/generation/tensorflow.py

@@ -25,8 +25,8 @@
 
 import numpy as np
 
-from art.estimators.generation.generator import GeneratorMixin
 from art.estimators.tensorflow import TensorFlowV2Estimator
+from art.estimators.generation.generator import GeneratorMixin
 
 if TYPE_CHECKING:
 

art/estimators/tensorflow.py

@@ -16,7 +16,7 @@
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 """
-This module implements the abstract estimators `TensorFlowEstimator` and `TensorFlowV2Estimator` for TensorFlow models.
+This module implements the abstract estimators `TensorFlowV2Estimator` for TensorFlow models.
 """
 from __future__ import annotations
 

art/utils.py

@@ -99,7 +99,7 @@
     from art.estimators.classification.xgboost import XGBoostClassifier
     from art.estimators.certification.deep_z import PytorchDeepZ
     from art.estimators.certification.interval import PyTorchIBPClassifier
-    from art.estimators.certification.derandomized_smoothing.derandomized import BlockAblator, ColumnAblator
+    from art.estimators.certification.derandomized_smoothing.ablators import BlockAblator, ColumnAblator
     from art.estimators.generation.tensorflow import TensorFlowV2Generator
     from art.estimators.object_detection.object_detector import ObjectDetector
     from art.estimators.object_detection.pytorch_object_detector import PyTorchObjectDetector