六、tensorflow之添加层。

对于tensorflow来讲，利用python添加层是通过定义函数定义的。
比如，定一个层，实现activation(x*w+b) , activation是激活函数。

import tensorflow as tf
def add_layer(inputs, in_size, out_size, activation=None):
  Weights = tf.Variable(tf.random_normal([in_size,
  out_size]))
  biases = tf.Variable(tf.zeros([1, out_size]))+0.1
  Wx_plus_b = tf.matmul(inputs, Weights) + biases
  if activation = None:
    outputs=Wx_plus_b
  else:
    outputs= activation( Wx_plus_b)
  return outputs