tensorflow 的安装和更新
https://blog.csdn.net/eloque/article/details/78227620
查看 tensorflow 版本和安装路径
import tensorflow as tf
print tf.__version__
print tf.__path__
https://blog.csdn.net/u011961856/article/details/76861052
打印 tensor 中的数据
https://blog.csdn.net/helei001/article/details/51750910
tf.multiply 和 tf.matmul 的区别
https://blog.csdn.net/flyfish1986/article/details/79141763
