structures don't have the same sequence type

[ylfzr]

I ran python train.py --problem=mnist --save_path=./mnist.
And got the following error. I have no idea what is wrong with it, can anyboby help?

Traceback (most recent call last):
File "/Users/ylfzr/Documents/Projects/learning-to-learn-master/train.py", line 117, in
tf.app.run()
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/platform/app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "/Users/ylfzr/Documents/Projects/learning-to-learn-master/train.py", line 70, in main
second_derivatives=FLAGS.second_derivatives)
File "/Users/ylfzr/Documents/Projects/learning-to-learn-master/meta.py", line 401, in meta_minimize
info = self.meta_loss(make_loss, len_unroll, **kwargs)
File "/Users/ylfzr/Documents/Projects/learning-to-learn-master/meta.py", line 360, in meta_loss
name="unroll")
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/ops/control_flow_ops.py", line 2775, in while_loop
result = context.BuildLoop(cond, body, loop_vars, shape_invariants)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/ops/control_flow_ops.py", line 2604, in BuildLoop
pred, body, original_loop_vars, loop_vars, shape_invariants)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/ops/control_flow_ops.py", line 2561, in _BuildLoop
nest.assert_same_structure(list(packed_vars_for_body), list(body_result))
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 200, in assert_same_structure
_recursive_assert_same_structure(nest1, nest2, check_types)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 173, in _recursive_assert_same_structure
_recursive_assert_same_structure(n1, n2, check_types)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 173, in _recursive_assert_same_structure
_recursive_assert_same_structure(n1, n2, check_types)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 173, in _recursive_assert_same_structure
_recursive_assert_same_structure(n1, n2, check_types)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 173, in _recursive_assert_same_structure
_recursive_assert_same_structure(n1, n2, check_types)
File "/Users/ylfzr/anaconda/lib/python2.7/site-packages/tensorflow/python/util/nest.py", line 159, in _recursive_assert_same_structure
% (type_nest1, type_nest2))
TypeError: The two structures don't have the same sequence type. First structure has type <type 'tuple'>, while second structure has type <class 'sonnet.python.modules.gated_rnn.LSTMState'>.

Macos 10.12.6
tensorflow version used: 1.3.0

[louisfaury]

I had the same problem today, on MacOs 10.12.6 and Tensorflow 1.4.0. Will be interested if you find how to fix it!

[chenaddsix]

I had the same problem today, on ubuntu 16.04 and tensorflow 1.4.0

[zjnqh]

Encountering the same problem with Centos, kind of hoping for a solution.

[federicohyo]

I had the same problem. I solved it by using these versions of tensorflow and sonnet. dm-sonnet requires tensorflow 1.5 , see -> https://github.com/deepmind/sonnet .

pip uninstall tensorflow
pip uninstall dm-sonnet

pip install tensorflow==1.5.0
pip install dm-sonnet==1.7

I hope this helps,
Federico

[johnsears]

Would be helpful to check in a requirements.txt file.

[xiaozhouxiao]

same problem here - even though I have tensorflow 1.7. Does it have to be version 1.5? Has anyone tried/figured out a way around this? Thanks.

[jli238]

having the same problem even change to tf 1.5.0. Did anyone figure out any possible solutions to this problem yet? Thank you.

[mily33]

It is because the input and output of the LSTMcell don't have the same type in tf.while_loop. The problem can be solved by a slight change in meta.py.
line 305
state.append(_nested_variable( [net.initial_state_for_inputs(x[j], dtype=tf.float32) for j in subset], name="state", trainable=False))
to
state.append([net.initial_state_for_inputs(x[j], dtype=tf.float32) for j in subset])

line 368
variables = (nest.flatten(_nested_variable(state)) + x + constants)

line 377
update = (nest.flatten(_nested_assign(x, x_final)) + nest.flatten(_nested_assign(_nested_variable(state), s_final)))

Hope this help!

[hitvoice]

@mily33 's method works with tf1.4.1 on Mac and Ubuntu. Thanks!

[minhnhat93]

had similar problems, @mily33 solved the issues. would it be possible to have a PR to fix this on the main repo?

[hoangcuong2011]

It works like a charm! Thanks @mily33

[BigWZhu]

@mily33 Thanks a lot for solving the problem