tf變量不會更改值嗎？

Question

我只是想用.assign（）更改tf.Variable的值，但它總是打印「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) 

編輯：這個作品

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

分配只創建操作來改變變量，你必須運行它：

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)