pybrain的神经网络的保存，导入导出 保存训练结果
from pybrain.tools.shortcuts import buildNetwork
from pybrain.tools.customxml import NetworkWriter
from pybrain.tools.customxml import NetworkReader
net = buildNetwork(2, 4, 1)
NetworkWriter.writeToFile(net, 'testNet.xml')
net = NetworkReader.readFrom('testNet.xml')