pickle使用及案例

一、字典格式数据源写入数据库文件

 #！/usr/bin/env python
 # -*- coding:utf-8 -*-
 import pickle
 accounts ={1000:'alex',
            'name':'xxx',
            'email':'xxxxsss@163.com',
            'password':'abc123',
            'balance':100000,
         'phone':13643424246,
            'bank_acc':{'icbc':132435,'abc':557868687,'bac':787977564}}

 print(pickle.dumps(accounts))
 f=open('account.db','wb')
 f.write(pickle.dumps(accounts))
 f.close()

二、打开文件，修改文件，关闭文件

 import pickle
 accFile = open('account.db','rb')
 accDict = pickle.loads(accFile.read())
 accFile.close()
 accDict['balance']-=500

 f=open('account.db','wb')
 f.write(pickle.dumps(accDict))
 f.close()
 print(accDict)

三、打开文件最后核查

 import pickle
 f = open('account.db','rb')
 account_db = pickle.loads(f.read())
 f.close()
 print(account_db)