shelve模块

Posted 2020-10-03 炉山假面目

shelve是一个简单的k,v将内存数据通过文件持久化的模块，可以持久化任何pickle可支持的python数据格式，是pickle更上一层的封装

1. 存储数据

1 import shelve,datetime
2 dd = shelve.open(‘shelve_test‘)
3 info = {"age":25,‘job‘:‘it‘}
4 name = ["zhangsan","lisi","wangwu","zhaoliu"]
5 dd["name"] = name
6 dd["info"] = info
7 dd["date"] = datetime.datetime.now()
8 dd.close()

 

2. 取回数据

1 import shelve,datetime
2 d = shelve.open(‘shelve_test‘)
3 print(d.get("name"))
4 print(d.get("info"))
5 print(d.get("date"))

 得到的结果如下：

[‘zhangsan‘, ‘lisi‘, ‘wangwu‘, ‘zhaoliu‘]
{‘age‘: 25, ‘job‘: ‘it‘}
2017-08-17 09:47:43.473363