pybrain

# -*- coding: utf-8 -*-

from pybrain.structure import FeedForwardNetwork
from pybrain.structure import LinearLayer, SigmoidLayer
from pybrain.structure import FullConnection

#定义反馈神经网络
n = FeedForwardNetwork()

#定义层
inLayer = LinearLayer(2)
hiddenLayer = SigmoidLayer(3)
outLayer = LinearLayer(1)
n.addInputModule(inLayer)
n.addModule(hiddenLayer)
n.addOutputModule(outLayer)

#定义连接
in_to_hidden = FullConnection(inLayer, hiddenLayer)
hidden_to_out = FullConnection(hiddenLayer, outLayer)
n.addConnection(in_to_hidden)
n.addConnection(hidden_to_out)

#使模型可用
n.sortModules()

#使用模型
print n.activate([1, 2])

#打印模型结构
print n

#打印模型参数
print in_to_hidden.params
print hidden_to_out.params
#或者 print n.params