自定义决策树保存——python pickle模块实现

定义两个函数，storeTree用于把决策树以二进制形式保存到文件中，grabTree从文件中读出决策树到内存文件后缀名为.pkl#!/usr/bin/env python# -*- coding: utf-8 -*-import pickledef storeTree(inputTree, filename):"""Serialize the decision t.

jiangjiane

1148人浏览 · 2018-10-31 11:47:05

jiangjiane · 2018-10-31 11:47:05 发布

定义两个函数，storeTree用于把决策树以二进制形式保存到文件中，grabTree从文件中读出决策树到内存

文件后缀名为.pkl

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import pickle


def storeTree(inputTree, filename):
    """Serialize the decision tree and save it to a pickle file."""
    
    fw = open(filename,'wb')
    pickle.dump(inputTree,fw)
    fw.close()
 

def grabTree(filename):
    """Convert the decision tree file into memory."""
    
    fr = open(filename,'rb')
    return pickle.load(fr)

注：这里打开方式得写成'wb'和'rb'，否则会出现异常。