model.fit_generator gave TypeError: 'NoneType' object is not callable

[chuagh74]

No description provided.

[chuagh74]

This is the error msg I got:

---

TypeError Traceback (most recent call last)
in
6 validation_data = ValAugmentGenerator(),
7 validation_steps = validation_steps,
----> 8 epochs=num_epochs, callbacks=callbacks)
9 model.save_weights("camvid_model_150_epochs.h5", overwrite=True)

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/util/deprecation.py in new_func(*args, **kwargs)
322 'in a future version' if date is None else ('after %s' % date),
323 instructions)
--> 324 return func(*args, **kwargs)
325 return tf_decorator.make_decorator(
326 func, new_func, 'deprecated',

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/keras/engine/training.py in fit_generator(self, generator, steps_per_epoch, epochs, verbose, callbacks, validation_data, validation_steps, validation_freq, class_weight, max_queue_size, workers, use_multiprocessing, shuffle, initial_epoch)
1477 use_multiprocessing=use_multiprocessing,
1478 shuffle=shuffle,
-> 1479 initial_epoch=initial_epoch)
1480
1481 @deprecation.deprecated(

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/keras/engine/training.py in _method_wrapper(self, *args, **kwargs)
64 def _method_wrapper(self, *args, **kwargs):
65 if not self._in_multi_worker_mode(): # pylint: disable=protected-access
---> 66 return method(self, *args, **kwargs)
67
68 # Running inside run_distribute_coordinator already.

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/keras/engine/training.py in fit(self, x, y, batch_size, epochs, verbose, callbacks, validation_split, validation_data, shuffle, class_weight, sample_weight, initial_epoch, steps_per_epoch, validation_steps, validation_batch_size, validation_freq, max_queue_size, workers, use_multiprocessing)
846 batch_size=batch_size):
847 callbacks.on_train_batch_begin(step)
--> 848 tmp_logs = train_function(iterator)
849 # Catch OutOfRangeError for Datasets of unknown size.
850 # This blocks until the batch has finished executing.

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/eager/def_function.py in call(self, *args, **kwds)
578 xla_context.Exit()
579 else:
--> 580 result = self._call(*args, **kwds)
581
582 if tracing_count == self._get_tracing_count():

/cm/shared/apps/tensorflow2-py37-cuda10.2-gcc/2.2.0/lib/python3.7/site-packages/tensorflow/python/eager/def_function.py in _call(self, *args, **kwds)
609 # In this case we have created variables on the first call, so we run the
610 # defunned version which is guaranteed to never create variables.
--> 611 return self._stateless_fn(*args, **kwds) # pylint: disable=not-callable
612 elif self._stateful_fn is not None:
613 # Release the lock early so that multiple threads can perform the call

TypeError: 'NoneType' object is not callable

[nikithanair95]

Did you get a solution to this error?

[chuagh74]

yes. That's because I was not using right version of TF

[nikithanair95]

Which version did you use to get it right?

[chuagh74]

According to my technical support, we were using keras ....we should use tf keras....so he removed keras and use tf keras

[nikithanair95]

We are importing tenserflow.keras everywhere still we are getting error. Could you please tell me where did you exactly change in the code ?

[chuagh74]

It was very long ago and i can't remember exactly. But what i remembered is we removed keras and reinstalled tensorflow and change import of keras to tensorflow.keras

from tensorflow.keras.models import Model
from tensorflow.keras.regularizers import l2
from tensorflow.keras.layers import *
#from tensorflow.keras.engine import Layer
from tensorflow.keras.applications.vgg16 import *
from tensorflow.keras.models import *
#from tensorflow.keras.applications.imagenet_utils import _obtain_input_shape
import tensorflow.keras.backend as K
import tensorflow as tf
from tensorflow.keras.optimizers import Adam
from tensorflow.keras.layers import Convolution2D, ZeroPadding2D, MaxPooling2D, Cropping2D, Conv2D
from tensorflow.keras.layers import Input, Add, Dropout, Permute, add
from tensorflow.compat.v1.layers import conv2d_transpose
from tensorflow.keras.preprocessing.image import ImageDataGenerator
from tensorflow.python.keras.callbacks import TensorBoard, ModelCheckpoint, EarlyStopping, ReduceLROnPlateau