python json pickle 模块持久化

python json pickle 模块持久化

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

__author__ = "[email protected]"

# 使用pickle模块将数据对象保存到文件

import pickle
import json

data1 = {'a': [1, 2.0, 3, '4 + 6j'],
         'b': ('string', u'Unicode string'),
         'c': None}

selfref_list = [1, 2, 3]

###########################################################
# pickle

with open('data.txt','wb') as f:
    pickle.dump(data1,f) #写入
    pickle.dump(selfref_list,f) #写入

with open('data.txt', 'rb') as f:
    print(pickle.load(f))   #读出
    print(pickle.load(f))   #读出

##########################################################
# json

#写入原始数据
with open('json1.json','w') as f:
    json.dump(data1,f)

#读出数据
with open('json1.json', 'r') as f:
    j = json.load(f)

#修改再写入
j['b'].append('thello')

with open('json1.json','w') as f:
    json.dump(j,f)