y_permute_dim.pop(-2) pop index out of range

[imgoodman]

hi, this is an awesome implementation.
However, when I use AttLayer, I got an IndexError: pop index out of range.
It is found in eij = K.tanh(K.dot(x, self.W)).
Then, y_permute_dim =[y_permute_dim.pop(-2)] + y_permute_dim.
my keras is 2.1.5.
Thanks a lot

[blog4me]

I have same problems in "eij = K.tanh(K.dot(x, self.W))", it says IndexError: pop index out of range, my keras is 1.2.2, can you tell me what's going on?

[tianke0711]

same problem

[tensor-flower]

same problem

[DingYunxia]

I have encountered the same problem now, how did you solve it?

[prabhatkgupta]

@imgoodman @DingYunxia You can switch Keras backend to Theano. This might be helpful to change the backend of Keras

import keras.backend as K
import importlib
import os


def change_keras_backend(backend):
    if K.backend() != backend:
        os.environ['KERAS_BACKEND'] = backend
        importlib.reload(K)


change_keras_backend("theano")