Keras backend - ImportError: cannot import name ctc_ops

Question

I have installed keras but when I write import keras I am getting the error : ImportError: cannot import name ctc_ops, I want to change the backend from tensor flow to theano but cannot find "keras.json" as mentioned here : https://keras.io/backend/ . Please help me how to resolve this issue. Thanks

Answer 1

As mentionned in the official documentation, you cannot have this json file using ~/.keras/keras.json unless you have already run it at least once before. I suggest you to create on with the default configuration:

{
    "image_dim_ordering": "tf",
    "epsilon": 1e-07,
    "floatx": "float32",
    "backend": "tensorflow"
}

Answer 2

If you have run Keras at least once, you will find the Keras configuration file at:

$HOME/.keras/keras.json

If it isn't there, you can create it.

NOTE for Windows Users: Please change $HOME with %USERPROFILE%.

Answer 3

Get a more recent version of tensorflow. The default tensorflow installed by conda is currently 0.9.0, which too old. Try upgrading for instance with conda upgrade -c conda-forge tensorflow or pip install tensorflow --upgradeif you don't use conda.