Tensorflow Placeholder

Placeholder可以用来取数据

import tensorflow as tf

input_1 = tf.placeholder(tf.float32)#先把坑占了，不用提前指定具体值
input_2 = tf.placeholder(tf.float32)#比如每个batch

output_op = tf.multiply(input_1,input_2)

with tf.Session() as sess:
    sess.run(tf.global_variables_initializer())
    var_res = sess.run([output_op], feed_dict={input_1:[1.0], input_2:[2.0]})
    print(var_res)