在学习决策树时，对决策树的存储使用了这样一段代码
def storeTree(inputTree,filename):
import pickle
fw = open(filename,'w')
pickle.dump(inputTree,fw)
fw.close()
def grabTree(filename):
import pickle
fr = open(filename)
return pickle.load(fr)
于是可以看出Pickle模块是用来进行数据的本地存储的，其用法如下
http://python.usyiyi.cn/python_278/library/pickle.html
https://www.google.com.hk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0ahUKEwj98Yrqj8HOAhWPJSwKHWvrAHkQFghGMAY&url=http%3a%2f%2fwww%2epythonclub%2eorg%2fmodules%2fpickle&usg=AFQjCNERyGqaqohWLqNviEIifQK7mIrt9Q&sig2=rhOdVgFaPs7nu0sdt1jc1g
