Incompatibility with Tensorflow version r0.12

[wanghm92]

Hi Mr Dozat!

There seems to be some slight problem with your current code, which I assume to be because of the version upgrade of Tensorflow. When I pulled your repo and run, it gives me the following error

Traceback (most recent call last):
  File "network.py", line 392, in <module>
    network = Network(model, **cargs)
  File "network.py", line 66, in __init__
    self._ops = self._gen_ops()
  File "network.py", line 308, in _gen_ops
    train_output = self._model(self._trainset)
  File "/home/hongmin/work/biaffine_parser/lib/models/parsers/parser.py", line 38, in __call__
    top_recur, _ = self.RNN(top_recur)
  File "/home/hongmin/work/biaffine_parser/lib/models/nn.py", line 96, in RNN
    dtype=tf.float32)
  File "/home/hongmin/work/biaffine_parser/lib/models/rnn.py", line 422, in dynamic_bidirectional_rnn
    output_fw, output_state_fw = dynamic_rnn(cell_fw, inputs, sequence_length, initial_state_fw, ff_keep_prob, recur_keep_prob, dtype, parallel_iterations, swap_memory, time_major, scope=fw_scope)
  File "/home/hongmin/work/biaffine_parser/lib/models/rnn.py", line 540, in dynamic_rnn
    [_assert_has_shape(sequence_length, [batch_size])]):
  File "/home/hongmin/work/biaffine_parser/lib/models/rnn.py", line 532, in _assert_has_shape
    return logging_ops.Assert(
AttributeError: 'module' object has no attribute 'Assert'

I checked the "logging_op.py" it says:

The python wrapper for Assert is in control_flow_ops, as the Assert call relies on certain conditionals for its dependencies. Use_ control_flow_ops.Assert.

I tried to replace lib/models/rnn.py", line 532, in _assert_has_shap: return logging_ops.Assert by return control_flow_ops.Assert, and the error is gone, but futher errors come out.

However, I'm not able to guarantee no effects to other codes. I guess, if you don't mind, just try to debug and make changes to all?

Thanks!