'Generate random pseudo-boolean key and message values.'

def get_message_and_key(self):

    batch_size = tf.placeholder_with_default(FLAGS.batch_size, shape=[])
    in_m = batch_of_random_bools(batch_size, TEXT_SIZE)
    in_k = batch_of_random_bools(batch_size, KEY_SIZE)
    return (in_m, in_k)
