pickle使用及案例

一、字典格式数据源写入数据库文件

 1 #！/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 import pickle
 4 accounts ={1000:'alex',
 5            'name':'xxx',
 6            'email':'xxxxsss@163.com',
 7            'password':'abc123',
 8            'balance':100000,
 9         'phone':13643424246,
10            'bank_acc':{'icbc':132435,'abc':557868687,'bac':787977564}}
11 
12 print(pickle.dumps(accounts))
13 f=open('account.db','wb')
14 f.write(pickle.dumps(accounts))
15 f.close()

二、打开文件，修改文件，关闭文件

 1 import pickle
 2 accFile = open('account.db','rb')
 3 accDict = pickle.loads(accFile.read())
 4 accFile.close()
 5 accDict['balance']-=500
 6 
 7 
 8 f=open('account.db','wb')
 9 f.write(pickle.dumps(accDict))
10 f.close()
11 print(accDict)

三、打开文件最后核查

1 import pickle
2 f = open('account.db','rb')
3 account_db = pickle.loads(f.read())
4 f.close()
5 print(account_db)