tensorflow--Variable

import tensorflow as tf
import os
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'

state = tf.Variable(0,name='counter')

#定义常量one
one = tf.constant(1)

#定义加法步骤,(注:此步没有直接计算 new_value= state+one)
new_value = tf.add(state,one)

#将State更新成new_value
update = tf.assign(state,new_value)

#若此时定义Variable,就一定要initialize
init = tf.global_variables_initializer()
#使用Session
with tf.Session() as sess:
    sess.run(init)
    for _ in range(3):
        sess.run(update)
        print(sess.run(state))