Theano：RNN dropout is no longer supported with the Theano backend

/home/zoe_env/anaconda2/lib/python2.7/site-packages/keras/layers/recurrent.py:1550: UserWarning: RNN dropout is no longer supported with the Theano backend due to technical limitations. You can either set dropout and recurrent_dropout to 0, or use the TensorFlow backend.
'RNN dropout is no longer supported with the Theano backend '

Theano中的RNN 不在支持dropout，需要将dropout and recurrent_dropout设置为0，或者是使用Tensorflow

详情可见：Source code for keras.layers.recurrent