error on training

[dbswnsdud123]

i'm using a google colab.
when i start !python train_val.py

Traceback (most recent call last):
File "train_val.py", line 86, in
verbose=1)
File "/usr/local/lib/python3.6/dist-packages/keras/legacy/interfaces.py", line 91, in wrapper
return func(*args, **kwargs)
File "/usr/local/lib/python3.6/dist-packages/keras/engine/training.py", line 1658, in fit_generator
initial_epoch=initial_epoch)
File "/usr/local/lib/python3.6/dist-packages/keras/engine/training_generator.py", line 103, in fit_generator
callbacks._call_begin_hook('train')
File "/usr/local/lib/python3.6/dist-packages/keras/callbacks.py", line 103, in _call_begin_hook
self.on_train_begin()
File "/usr/local/lib/python3.6/dist-packages/keras/callbacks.py", line 219, in on_train_begin
callback.on_train_begin(logs)
File "/usr/local/lib/python3.6/dist-packages/tensorflow_core/python/keras/callbacks.py", line 905, in on_train_begin
if self.model._in_multi_worker_mode():
AttributeError: 'Model' object has no attribute '_in_multi_worker_mode'

[dabasajay]

Please make sure that you're using the right version of libraries as mentioned in the requirements section in Readme.md
I think this error is due to version mismatch as Keras & Tensorflow API is constantly changing and my code was tested on Tensorflow - 1.13.1 & Keras - 2.2.4.
P.S. I also used Google Colab for the project so there shouldn't be an issue provided that you have the right version of libraries.

[hggit]

This error arises due to the mixed usage of Keras API and tensorflow.keras API. I was able to resolve the error by changing
from tensorflow.keras.callbacks import ModelCheckpoint
to
from keras.callbacks import ModelCheckpoint
in the train_val.py file.

[dipendrachouhan007]

This error arises due to the mixed usage of Keras API and tensorflow.keras API. I was able to resolve the error by changing from tensorflow.keras.callbacks import ModelCheckpoint to from keras.callbacks import ModelCheckpoint in the train_val.py file.

In my code I used only keras. rather than tensorflow.keras. then also I am getting error:

tensorflow.python.framework.errors_impl.invalidargumenterror graph execution error

what should I do please tell me