tf变量不会更改值吗？

Question

我只是想用.assign（）更改tf.Variable的值，但它总是打印“0”？

import tensorflow as tf 

session = tf.Session() 

var = tf.Variable(0, "myVar") 

session.run(tf.initialize_all_variables()) 

var.assign(var + 1) 
print session.run(var) 

var.assign(var + 1) 
print session.run(var) 

编辑：这个作品

import tensorflow as tf 

session = tf.Session() 

var = tf.Variable(0, "myVar") 

session.run(tf.initialize_all_variables()) 

add = var.assign(var + 1) 
print session.run(add) 

print session.run(add) 

Answer 1

分配只创建操作来改变变量，你必须运行它：

import tensorflow as tf 

session = tf.Session() 

var = tf.Variable(0, "myVar") 

session.run(tf.initialize_all_variables()) 

session.run(var.assign(var + 1)) 
print session.run(var) 

session.run(var.assign(var + 1)) 
print session.run(var)