python json pickle 模块持久化
#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = "jihongrui@jsqix.com"
# 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)
