tensorflow--placeholder传入值

import tensorflow as tf

import os
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'

#在Tensorflow中需要定义placeholder的type,一般为float32形式
input1 = tf.placeholder(tf.float32)
input2 = tf.placeholder(tf.float32)

#mul=multiply是将input1和input2做乘法运算，并输出为output
output = tf.multiply(input1,input2)

with tf.Session() as sess:
    print(sess.run(output,feed_dict={input1:7,input2:2}))
    print(sess.run(output,feed_dict={input1:[7],input2:[2]}))