Learning Forum

[mihnea.apostolescu]

Hello!

I encountered two issues while I was trying to convert a .keras convolutional neural networked trained and saved using tensorflow 2.16.1. I encountered the error below when I called the method : keras_importer.importer.model_import(loaded_model, "scade_model_path"), where loaded_model was my .keras CNN loaded using the tensorflow method keras_CNN_model = tf.keras.models.load_model(keras_CNN_path, compile=False)

"ANSYS(R) SCADE(R) - Keras Importer - Version 20220216.16 (C) 2022 ANSYS, Inc. Unauthorized use, distribution, or duplication is prohibited. Importing keras model to scade ... Translation of Conv2D layer: conv2d (id: 2320059174448) 'Conv2D' object has no attribute 'input_shape' Error: Keras Importer execution failure

c:\Users\\AppData\Local\Programs\Python\Python312\Lib\site-packages\keras\src\layers\core\input_layer.py:25: UserWarning: Argument input_shape is deprecated. Use shape instead. warnings.warn(

1 

"

That "1" is printed due to the return in the model_import method of the keras importer, which is part of the SCADE NN Package.

 

I tried converting a Keras model trained and saved using tensorflow 2.16.1 because of the compatibilities that the Nerual Networks Package described in its documentation :
However, I tried installing older versions of tensorflow (mostly 2.6.0) on a virtual environment which used python 3.9.4. Tensorflow 2.6.0 was not compatible with Python 3.12 which I used in the begining.

However, even if I tried installing the 2.6.0 versions of tensorflow and its tensorboard and tensorflow-estimator dependencies, I haven't succeeded in importing the keras importer of the SCADE NN Package afterwards. This is the error I encountered :

---------------------------------------------------------------------------

ImportError                               Traceback (most recent call last)

Cell In[1], line 5

      3 SCADE_keras_importer_path = os.path.join(os.getcwd(), 'ACT_Neural_Networks_Package_v1', 'src')

      4 sys.path.append(SCADE_keras_importer_path)

----> 5 import keras_importer.importer as ki

      6 import tensorflow as tf

 

File c:\\SCADE implementation\ACT_Neural_Networks_Package_v1\src\keras_importer\importer.py:101

     96     return opts

     98 ###########################################################################

     99 # Model translation

--> 101 def import_model(model:tf.keras.Model) -> scade.Model:

    102     # initialize project from template

    103     dir = module.opts['target_dir']

    104     res_dir = pathlib.Path(script_dir) / ".." / ".." / "resources" / "keras_importer"

 

File c:\\scade_environment\lib\site-packages\tensorflow\python\util\lazy_loader.py:62, in LazyLoader.__getattr__(self, item)

     61 def __getattr__(self, item):

---> 62   module = self._load()

     63   return getattr(module, item)

 

File c:\\scade_environment\lib\site-packages\tensorflow\python\util\lazy_loader.py:45, in LazyLoader._load(self)

     43 """Load the module and insert it into the parent's globals."""

     44 # Import the target module and insert it into the parent's namespace

---> 45 module = importlib.import_module(self.__name__)

     46 self._parent_module_globals[self._local_name] = module

     48 # Emit a warning if one was specified

 

File C:\Python39\lib\importlib\__init__.py:127, in import_module(name, package)

    125             break

    126         level += 1

--> 127 return _bootstrap._gcd_import(name[level:], package, level)

 

File c:\\scade_environment\lib\site-packages\keras\__init__.py:3

      1 """AUTOGENERATED. DO NOT EDIT."""

----> 3 from keras import __internal__

      4 from keras import activations

      5 from keras import applications

 

File c:\\scade_environment\lib\site-packages\keras\__internal__\__init__.py:3

      1 """AUTOGENERATED. DO NOT EDIT."""

----> 3 from keras.__internal__ import backend

      4 from keras.__internal__ import layers

      5 from keras.__internal__ import losses

 

File c:\\scade_environment\lib\site-packages\keras\__internal__\backend\__init__.py:3

      1 """AUTOGENERATED. DO NOT EDIT."""

----> 3 from keras.src.backend import _initialize_variables as initialize_variables

      4 from keras.src.backend import track_variable

 

File c:\\scade_environment\lib\site-packages\keras\src\__init__.py:21

      1 # Copyright 2015 The TensorFlow Authors. All Rights Reserved.

      2 #

      3 # Licensed under the Apache License, Version 2.0 (the "License");

   (...)

     13 # limitations under the License.

     14 # ==============================================================================

     15 """Implementation of the Keras API, the high-level API of TensorFlow.

     16 

     17 Detailed documentation and user guides are available at

     18 [keras.io](https://keras.io).

     19 """

---> 21 from keras.src import applications

     22 from keras.src import distribute

     23 from keras.src import models

 

File c:\\scade_environment\lib\site-packages\keras\src\applications\__init__.py:18

      1 # Copyright 2016 The TensorFlow Authors. All Rights Reserved.

      2 #

      3 # Licensed under the Apache License, Version 2.0 (the "License");

   (...)

     13 # limitations under the License.

     14 # ==============================================================================

     15 """Keras Applications are premade architectures with pre-trained weights."""

---> 18 from keras.src.applications.convnext import ConvNeXtBase

     19 from keras.src.applications.convnext import ConvNeXtLarge

     20 from keras.src.applications.convnext import ConvNeXtSmall

 

File c:\\scade_environment\lib\site-packages\keras\src\applications\convnext.py:28

     25 import numpy as np

     26 import tensorflow.compat.v2 as tf

---> 28 from keras.src import backend

     29 from keras.src import initializers

     30 from keras.src import layers

 

File c:\\scade_environment\lib\site-packages\keras\src\backend.py:34

     32 from keras.src import backend_config

     33 from keras.src.distribute import distribute_coordinator_utils as dc

---> 34 from keras.src.dtensor import dtensor_api as dtensor

     35 from keras.src.engine import keras_tensor

     36 from keras.src.utils import control_flow_util

 

File c:\\scade_environment\lib\site-packages\keras\src\dtensor\__init__.py:18

      1 # Copyright 2022 The TensorFlow Authors. All Rights Reserved.

      2 #

      3 # Licensed under the Apache License, Version 2.0 (the "License");

   (...)

     13 # limitations under the License.

     14 # ==============================================================================

     15 """Keras' DTensor library."""

---> 18 from tensorflow.compat.v2.experimental import dtensor as dtensor_api

 

ImportError: cannot import name 'dtensor' from 'tensorflow.compat.v2.experimental' (c:\\scade_environment\lib\site-packages\tensorflow\_api\v2\compat\v2\experimental\__init__.py)

 

 

Could you please help me solve these issues and find a solution for using the keras importer and the python wrapper included in the SCADE NN Package? 
Thank you in advance!