'NoneType' object has no attribute 'get_shape'

[rishabh-shah]

Hi,

I have been really struggling to get sentence completion work with encoder and decoder logic. After getting introduced to Seq2seq and recurrentshop, I could not imagine it being any easier. I have tried SimpleSeq2Seq() and Seq2Seq() to create a model but not able to get past the following issues,

After installing Seq2seq I used the Seq2seq API as follows,

Seq2Seq(
            input_dim=embedded_features_len,
            input_length=input_seq_length,
            hidden_dim=n_units,
            output_dim=vocab_size,
            output_length=output_seq_length,
            depth=1,
            batch_size = 64,
            dropout=0.2
)

At first I got

'_OptionalInputPlaceHolder' object has no attribute 'inbound_nodes'

error. This is a known issue which was fixed in #91 After I changed "inbound_nodes" to "_inbound_nodes" I get the following error,

'NoneType' object has no attribute 'get_shape'

After some debugging this is what I found,

Since the inputs list has 'None' elements, when we call line #487 (engine.py)

_collect_input_shape(inputs)

because we iterate through all elements of inputs, I now see this error and I am not able to get past this. Any help would be really appreciated.