TensorFlow1.11学习笔记

1、运行第一个TensorFlow程序

import os
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'

import tensorflow as tf
hello = tf.constant("hello  world!")
with tf.Session() as sess:
    print(sess.run(hello))

运行结果如下：
 

E:installanacondaenvstensorflowpython.exe E:/pythonProject2/0hello.py
b'hello  world!'

Process finished with exit code 0

##E:installanacondaenvstensorflowpython.exe E:/pythonProject2/0hello.py

##是我个人笔记本电脑的安装路径，每个人安装的不一样。

注意事项：

1）、如果出现

2021-11-30 19:39:48.566136: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2

可以在代码前添加

#import os
#os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'

2）代码解释

#导入TensorFlow

import tensorflow as tf 

#将hello world 赋值给hello变量

hello = tf.constant("hello  world!")

#通过上下文管理器使用会话，当上下文退出时会话关闭，资源自动释放
with tf.Session() as sess:
    print(sess.run(hello))