python线性神经网络库，简单易用，提供图形函数
调用代码如下：
traindata2=[[[9,25,30],-1],[[5,8,12],-1],[[15,31,49],-1],[[35,62,108],-1],[[19,40,60],-1],[[28,65,98],1],[[20,59,72],1],[[9,41,38],1],[[12,60,46],1],[[2,37,18],1]]
myann2=nplann.Mplannliner()
myann2.samples_init(traindata2)
myann2.train()
myc=myann2.simulate([35,68,110])
print "[35,68,110]"
if myc=="+":
print u"正类"
else:
print u"负类"
