Does not work with Keras==2.2.5 and tensorflow==1.14.0

[nkrot]

Hi,

This issue is related to and has the same origin as #113.

Training does not run, I managed to make it run by downgrading the versions of Keras and tensorflow as described in the linked version.

System information

• Linux Ubuntu 18.04:
• Keras v. 2.2.5
• tensorflow v. 1.14.0
• Python version: 3.6.8
• anago v.1.0.8 (installed with pip install)

Logs

    model.fit(x_train, y_train, epochs=30)
  File "venv/lib/python3.6/site-packages/anago/wrapper.py", line 80, in fit
    model, loss = model.build()
  File "/venv/lib/python3.6/site-packages/anago/models.py", line 115, in build
    pred = crf(z)
  File "venv/lib/python3.6/site-packages/keras/engine/base_layer.py", line 451, in __call__
    output = self.call(inputs, **kwargs)
  File "venv/lib/python3.6/site-packages/anago/layers.py", line 215, in call
    test_output = self.viterbi_decoding(X, mask)
  File "venv/lib/python3.6/site-packages/anago/layers.py", line 484, in viterbi_decoding
    argmin_tables = self.recursion(input_energy, mask, return_logZ=False)
  File "venv/lib/python3.6/site-packages/anago/layers.py", line 445, in recursion
    mask2 = K.cast(K.concatenate([mask, K.zeros_like(mask[:, :1])], axis=1), K.floatx())
  File "venv/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py", line 2176, in concatenate
    return tf.concat([to_dense(x) for x in tensors], axis)
  File "venv/lib/python3.6/site-packages/tensorflow/python/util/dispatch.py", line 180, in wrapper
    return target(*args, **kwargs)
  File "venv/lib/python3.6/site-packages/tensorflow/python/ops/array_ops.py", line 1299, in concat
    return gen_array_ops.concat_v2(values=values, axis=axis, name=name)
  File "venv/lib/python3.6/site-packages/tensorflow/python/ops/gen_array_ops.py", line 1256, in concat_v2
    "ConcatV2", values=values, axis=axis, name=name)
  File "venv/lib/python3.6/site-packages/tensorflow/python/framework/op_def_library.py", line 499, in _apply_op_helper
    raise TypeError("%s that don't all match." % prefix)
TypeError: Tensors in list passed to 'values' of 'ConcatV2' Op have types [bool, float32] that don't all match.

[nipunsadvilkar]

Try out keras==2.2.4

[nkrot]

@nipunsadvilkar , i managed to run the tool by downgrading the versions of keras, tensorflow and seqeval. I mentioned this in my post. The reason for filing the issue is to make the developer(s) aware of incompatibility with higher versions of said libraries.

[bedapudi6788]

For anyone looking for a way to make this library compatible with newer versions of keras and tf, replace the layers.py with https://github.com/bedapudi6788/seqtag-keras/blob/no_elmo/seqtag_keras/layers.py