AttributeError: 'Adam' object has no attribute 'get_weights' - tensorflow2.0

Question

I am pretty new to tensorflow Keras and there is a Problem Running Cross Validation that I could not fix. It all worked before I installed featurewiz (conda install -c conda-forge featurewiz).
from sklearn.model_selection import KFold, cross_validate, cross_val_score
from scikeras.wrappers import KerasClassifier
estimator = KerasClassifier(model, epochs=500, batch_size=10) #, verbose = 0
kfold = KFold(n_splits=5, shuffle=True)
results = cross_validate(estimator, X, y, cv=kfold, scoring=['accuracy', 'precision_weighted', 'recall_weighted', 'f1_weighted'], return_train_score=True)
print(results)
Error:
WARNING:absl:Found untraced functions such as _update_step_xla while saving (showing 1 of 1). These functions will not be directly callable after loading.
INFO:tensorflow:Assets written to: ram:///var/folders/c4/ywdtx99d1vl0ptsg1fy494_40000gn/T/tmpsuvxkjb9/assets
INFO:tensorflow:Assets written to: ram:///var/folders/c4/ywdtx99d1vl0ptsg1fy494_40000gn/T/tmpsuvxkjb9/assets
---------------------------------------------------------------------------
Empty Traceback (most recent call last)
File ~/tensorflow-test/env/lib/python3.8/site-packages/joblib/parallel.py:862, in Parallel.dispatch_one_batch(self, iterator)
861 try:
--> 862 tasks = self._ready_batches.get(block=False)
863 except queue.Empty:
864 # slice the iterator n_jobs * batchsize items at a time. If the
865 # slice returns less than that, then the current batchsize puts
(...)
868 # accordingly to distribute evenly the last items between all
869 # workers.
File ~/tensorflow-test/env/lib/python3.8/queue.py:167, in Queue.get(self, block, timeout)
166 if not self._qsize():
--> 167 raise Empty
168 elif timeout is None:
Empty:
During handling of the above exception, another exception occurred:
AttributeError Traceback (most recent call last)
Cell In[5], line 6
4 estimator = KerasClassifier(model, epochs=500, batch_size=10) #, verbose = 0
5 kfold = KFold(n_splits=5, shuffle=True) #seed, damit shuffle gleich bleibt , random_state=1337
----> 6 results = cross_validate(estimator, X, y, cv=kfold, scoring=['accuracy', 'precision_weighted', 'recall_weighted', 'f1_weighted'], return_train_score=True)
8 print(results)
File ~/tensorflow-test/env/lib/python3.8/site-packages/sklearn/model_selection/_validation.py:266, in cross_validate(estimator, X, y, groups, scoring, cv, n_jobs, verbose, fit_params, pre_dispatch, return_train_score, return_estimator, error_score)
263 # We clone the estimator to make sure that all the folds are
264 # independent, and that it is pickle-able.
265 parallel = Parallel(n_jobs=n_jobs, verbose=verbose, pre_dispatch=pre_dispatch)
--> 266 results = parallel(
267 delayed(_fit_and_score)(
268 clone(estimator),
269 X,
270 y,
271 scorers,
272 train,
273 test,
274 verbose,
275 None,
276 fit_params,
277 return_train_score=return_train_score,
278 return_times=True,
279 return_estimator=return_estimator,
280 error_score=error_score,
281 )
282 for train, test in cv.split(X, y, groups)
283 )
285 _warn_or_raise_about_fit_failures(results, error_score)
287 # For callabe scoring, the return type is only know after calling. If the
288 # return type is a dictionary, the error scores can now be inserted with
289 # the correct key.
File ~/tensorflow-test/env/lib/python3.8/site-packages/joblib/parallel.py:1085, in Parallel.__call__(self, iterable)
1076 try:
1077 # Only set self._iterating to True if at least a batch
1078 # was dispatched. In particular this covers the edge
(...)
1082 # was very quick and its callback already dispatched all the
1083 # remaining jobs.
1084 self._iterating = False
-> 1085 if self.dispatch_one_batch(iterator):
1086 self._iterating = self._original_iterator is not None
1088 while self.dispatch_one_batch(iterator):
File ~/tensorflow-test/env/lib/python3.8/site-packages/joblib/parallel.py:873, in Parallel.dispatch_one_batch(self, iterator)
870 n_jobs = self._cached_effective_n_jobs
871 big_batch_size = batch_size * n_jobs
--> 873 islice = list(itertools.islice(iterator, big_batch_size))
874 if len(islice) == 0:
875 return False
File ~/tensorflow-test/env/lib/python3.8/site-packages/sklearn/model_selection/_validation.py:268, in <genexpr>(.0)
263 # We clone the estimator to make sure that all the folds are
264 # independent, and that it is pickle-able.
265 parallel = Parallel(n_jobs=n_jobs, verbose=verbose, pre_dispatch=pre_dispatch)
266 results = parallel(
267 delayed(_fit_and_score)(
--> 268 clone(estimator),
269 X,
270 y,
271 scorers,
272 train,
273 test,
274 verbose,
275 None,
276 fit_params,
277 return_train_score=return_train_score,
278 return_times=True,
279 return_estimator=return_estimator,
280 error_score=error_score,
281 )
282 for train, test in cv.split(X, y, groups)
283 )
285 _warn_or_raise_about_fit_failures(results, error_score)
287 # For callabe scoring, the return type is only know after calling. If the
288 # return type is a dictionary, the error scores can now be inserted with
289 # the correct key.
File ~/tensorflow-test/env/lib/python3.8/site-packages/sklearn/base.py:89, in clone(estimator, safe)
87 new_object_params = estimator.get_params(deep=False)
88 for name, param in new_object_params.items():
---> 89 new_object_params[name] = clone(param, safe=False)
90 new_object = klass(**new_object_params)
91 params_set = new_object.get_params(deep=False)
File ~/tensorflow-test/env/lib/python3.8/site-packages/sklearn/base.py:70, in clone(estimator, safe)
68 elif not hasattr(estimator, "get_params") or isinstance(estimator, type):
69 if not safe:
---> 70 return copy.deepcopy(estimator)
71 else:
72 if isinstance(estimator, type):
File ~/tensorflow-test/env/lib/python3.8/copy.py:153, in deepcopy(x, memo, _nil)
151 copier = getattr(x, "__deepcopy__", None)
152 if copier is not None:
--> 153 y = copier(memo)
154 else:
155 reductor = dispatch_table.get(cls)
File ~/tensorflow-test/env/lib/python3.8/site-packages/scikeras/_saving_utils.py:117, in deepcopy_model(model, memo)
116 def deepcopy_model(model: keras.Model, memo: Dict[Hashable, Any]) -> keras.Model:
--> 117 _, (model_bytes, optimizer_weights) = pack_keras_model(model)
118 new_model = unpack_keras_model(model_bytes, optimizer_weights)
119 memo[model] = new_model
File ~/tensorflow-test/env/lib/python3.8/site-packages/scikeras/_saving_utils.py:108, in pack_keras_model(model)
106 optimizer_weights = None
107 if model.optimizer is not None:
--> 108 optimizer_weights = model.optimizer.get_weights()
109 model_bytes = np.asarray(memoryview(b.read()))
110 return (
111 unpack_keras_model,
112 (model_bytes, optimizer_weights),
113 )
AttributeError: 'Adam' object has no attribute 'get_weights'
I created a Tensorflow enviroment on my M1 Macbook following https://github.com/mrdbourke/m1-machine-learning-test.
It all worked, I got following results:
TensorFlow has access to the following devices:
[PhysicalDevice(name='/physical_device:CPU:0', device_type='CPU'), PhysicalDevice(name='/physical_device:GPU:0', device_type='GPU')]
TensorFlow version: 2.11.0
I also installed featurewiz, I am not sure if there are some Problems installing it (I did conda install -c conda-forge featurewiz)

Answer 1

SciKeras doesn't work with TensorFlow 2.11. The TensorFlow team release a breaking change in a minor version bump (they removed the get_weights() method). It will be fixed in SciKeras soon: https://github.com/adriangb/scikeras/pull/287
Edit: that PR was merged so the new version of SciKeras (v0.10.0) should solve this issue.