import tensorflow as tf

            else:
                self.c_maxlen, self.q_maxlen = config.para_limit, config.ques_limit

            self.ch_len = tf.reshape(tf.reduce_sum(
                tf.cast(tf.cast(self.ch, tf.bool), tf.int32), axis=2), [-1])
            self.qh_len = tf.reshape(tf.reduce_sum(
                tf.cast(tf.cast(self.qh, tf.bool), tf.int32), axis=2), [-1])

