global_step Variables are used to save the global training steps (global training step) Value of .

It's always moving average , This parameter is used when the learning rate changes .

use optimizer.minimize() Can be updated automatically global_step.

# -*-coding: utf-8-*- import tensorflow as tf import numpy as np x =
tf.placeholder(tf.float32, shape=[None, 1], name='x') y =
tf.placeholder(tf.float32, shape=[None, 1], name='y') w =
tf.Variable(tf.constant(0.0)) global_steps = tf.Variable(0, trainable=False)
learning_rate = tf.train.exponential_decay(0.1, global_steps, 10, 0.9,
staircase=False) loss = tf.pow(w*x - y, 2) train_op =
global_step=global_steps) with tf.Session() as sess: for i in range(10):, feed_dict={x: np.linspace(1, 2, 10).reshape([10, 1]), y:
np.linspace(1, 2, 10).reshape([10, 1])}) print print

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