Prediction is not working

[BenjamWhite]

I'm running the same code on test data and get strange weights back.

import h5py
with h5py.File('data/%s.hdf5'%FN1, mode='r') as f:
    if 'layer_names' not in f.attrs and 'model_weights' in f:
        f = f['model_weights']
    weights = [np.copy(v) for v in f['timedistributed_1'].itervalues()]

and
map(lambda x: x.shape, weights)
is giving me back:
[(2,)]

Also run the code with Keras 2.0.0 and the actual version. Can it be due to different versions?

Thanks in advance!

[imranshaikmuma]

@BenjamWhite i am trying to fix this problem from two days. please help me if you find it too..

[BenjamWhite]

I thought first it might be something with theano and tensorflow as they store data in different order, but changing channel_first to channel_last didn't help.

[imranshaikmuma]

what i feel is file is not having weights of 'time_distributed_1' layer. i googled and find nothing on this. it has only [array(['bias:0', 'kernel:0'], dtype='<U8')] inside.

[BenjamWhite]

well, that's a different issue, when TimeDistributed gets defined, there is a
), missing before name.
So it assigns the name to the Dense method.
Before:

model.add(TimeDistributed(Dense(vocab_size,
                                kernel_regularizer=regularizer, 
                                bias_regularizer=regularizer, name = 'timedistributed_1')))

After:

model.add(TimeDistributed(Dense(vocab_size,
                                kernel_regularizer=regularizer, 
                                bias_regularizer=regularizer),
                                name = 'timedistributed_1'))

There is also a method to show the content of the h5py.

Haha, that's the next error I'm getting with those values [array(['bias:0', 'kernel:0'], dtype='<U8')]
the

# out very own softmax
def output2probs(output):
    print 'output:', type(output), output
    print 'weights[0]:', type(weights[0]), weights[0]
    #print 'weights[1]:', type(weights[1])
    output = np.dot(output, weights[0]) + weights[1]
    output -= output.max()
    output = np.exp(output)
    output /= output.sum()
    return output

is saying it doesn't know dtype='<U8'

[imranshaikmuma]

weights[0] and weights[1] should be an array of weights. we are not getting that from our trained model file. if you can solve this, everything will be automatically solved

[imranshaikmuma]

check this link it helped me a lot (Cell 94)
https://github.com/rtlee9/recipe-summarization/blob/master/src/predict.ipynb
here when we are using fit_generator, weights are produced till dropout3 only. and there is no layer for time distributed..everyone has the same problem but they ignored and moved on..

[BenjamWhite]

where you able to run this?

[imranshaikmuma]

i am able to run but i am not getting the desired output.
i am using a different data like job description and generating a job title
my data is huge and i am looking for gpu to train the model
what about you?

[BenjamWhite]

didn't really work on it anymore (had no time so far), so basically still the same error.
how did you get around that error before?

What is the diff between expected and real output?
Is it a data problem?

[Elaine]

If you open the hdf5 file you should see the file structure.
For me, I had to modify it to

import h5py
with h5py.File('data/%s.hdf5'%FN1, mode='r') as f:
    if 'layer_names' not in f.attrs and 'model_weights' in f:
        f = f['model_weights']
    weights = [np.copy(v) for v in f['time_distributed_1']['time_distributed_1'].values()]
weights = np.array([weights[1], weights[0]])

[Nauman A Butt]

@elainelinlin did you get any prediction out of it? For your own data?

[Elaine]

@fzr2009 Yes. What is not working for you?

[Nauman A Butt]

@elainelinlin I get this KeyError every time with different string in it, Please help if you can