Tensorflow學習教程------變量
阿新 • • 發佈:2017-10-07
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代碼
#coding:utf-8 import tensorflow as tf x = tf.Variable([1,2]) a = tf.constant([3,3]) #增加一個減法op sub = tf.subtract(x,a) #增加一個加法op add = tf.add(x,sub) #有變量 一定要初始化 初始化所有的變量 init = tf.global_variables_initializer() with tf.Session() as sess: sess.run(init) print(sess.run(sub)) print(sess.run(add))#自加操作 #創建一個變量初始化為0 state = tf.Variable(0,name=‘counter‘) #創建一個op 作用是使state加1 new_value = tf.add(state,1) #賦值操作 將new_value賦值給state update = tf.assign(state,new_value) init = tf.global_variables_initializer() with tf.Session() as sess: sess.run(init) print (sess.run(state)) for _ in range(5): sess.run(update)print (sess.run(state))
結果
name: GeForce GTX 1080 Ti major: 6 minor: 1 memoryClockRate (GHz) 1.582 pciBusID 0000:03:00.0 Total memory: 10.91GiB Free memory: 10.18GiB I tensorflow/core/common_runtime/gpu/gpu_device.cc:906] DMA: 0 I tensorflow/core/common_runtime/gpu/gpu_device.cc:916] 0: Y I tensorflow/core/common_runtime/gpu/gpu_device.cc:975] Creating TensorFlow device (/gpu:0) -> (device: 0, name: GeForce GTX 1080 Ti, pci bus id: 0000:03:00.0) [-2 -1] [-1 1] I tensorflow/core/common_runtime/gpu/gpu_device.cc:975] Creating TensorFlow device (/gpu:0) -> (device: 0, name: GeForce GTX 1080 Ti, pci bus id: 0000:03:00.0) 0 1 2 3 4 5
Tensorflow學習教程------變量