AttributeError: 'module' object has no attribute 'rnn_decoder'

[zt-BIT]

Hello:
I'm using TF1.3.0 and python2.7 the same as you.But when I run the code,the error occurred as this form:AttributeError: 'module' object has no attribute 'rnn_decoder'.That is, the model import tensorflow.contrib.seq2seq as seq2seq doesn't have the function 'rnn_decoder'.Could you tell me how I can fix this problem??
Thank you!