Tensorflow学习笔记：tf.placeholder的用法

python

placeholder的用法

import tensorflow as tf   
import numpy as np
x = tf.placeholder(tf.float32, shape=(5, 5)) #形参
y = tf.matmul(x, x)
with tf.Session() as sess:
    # print(sess.run(y))  # ERROR: 此处x还没赋值.
    rand_array = np.random.rand(5, 5)
    print(sess.run(y, feed_dict={x: rand_array}))  # Will succeed.