revert tensor/attribute.py

Author: SigureMo

python/paddle/tensor/attribute.py

@@ -12,19 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# TODO: define functions to get tensor attributes
-
-import numpy as np
+from ..framework import core
+from ..framework import LayerHelper
+from ..fluid.data_feeder import check_variable_and_dtype
+from ..fluid.data_feeder import check_type
 
+from .creation import assign
+from .creation import _complex_to_real_dtype
 
+# TODO: define functions to get tensor attributes
 import paddle
 from paddle import _C_ops, _legacy_C_ops
-
-from ..fluid.data_feeder import check_type, check_variable_and_dtype
-from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
-from ..framework import LayerHelper, core
 from ..static import Variable
-from .creation import _complex_to_real_dtype, assign
+from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
+
+import numpy as np
 
 __all__ = []