tensorflow bias_add应用

import tensorflow as tf

a=tf.constant([[1,1],[2,2],[3,3]],dtype=tf.float32)
b=tf.constant([1,-1],dtype=tf.float32)
c=tf.constant([1],dtype=tf.float32)

with tf.Session() as sess:
    print(‘bias_add:‘)
    print(sess.run(tf.nn.bias_add(a, b)))
    #执行下面语句错误
    #print(sess.run(tf.nn.bias_add(a, c)))

    print(‘add:‘)
    print(sess.run(tf.add(a, c)))