'''
Author: 365JHWZGo
Description:2.placeholder的使用
Date: 2021-10-12 11:46:03
FilePath: tensorflowtensorflowday02-3.py
LastEditTime: 2021-10-12 11:51:51
LastEditors: 365JHWZGo
'''
import tensorflow as tf
#创建变量
#placeholder是Tensorflow 中的占位符，暂时储存变量，用于外部传入data
input1 = tf.placeholder(tf.float32)
input2 = tf.placeholder(tf.float32)
#创建模型
#tf.mul在新版本中更新为tf.multiply
output = tf.multiply(input1,input2)
#训练
#placeholder与feed_dict进行绑定，对原来的占位符进行赋值
with tf.Session() as sess:
print(sess.run(output,feed_dict={input1:[7.],input2:[2.]}))
结果为:
