import tensorflow as tf

# values: [batch_size, step_size, vocab_size]
# answers: [batch_size, step_size]
def _mask_and_accuracy(values, answers, loss_weights):
    values = tf.argmax(values,axis=2)
    x = tf.cast(values, dtype=tf.int32)
    y = tf.cast(answers, dtype=tf.int32)
