AttributeError: module 'tensorflow.python.keras.engine.data_adapter' has no attribute 'DataHandler'

[Andrew0613]

Hi, I got a problem when running CTCModel:
CTCModel-master/keras_ctcmodel/CTCModel.py", line 732, in predict
data_handler = data_adapter.DataHandler(
AttributeError: module 'tensorflow.python.keras.engine.data_adapter' has no attribute 'DataHandler'
It seems that DataHandler cannot be imported sucessfully.
I'm using keras==2.3.1 ,tensorflow==2.1.0, python3.6. I think this might be caused by some compatibility issues.
Thank you!