python持久化对象

Posted 2020-11-21 TQCAI

通过shelve模块即可持久化对象

• 代码

import shelve
import numpy as np

def writeObj(name,obj):
    with shelve.open(‘object‘) as db:
        db[name]=obj

def readObj(name):
    try:
        with shelve.open(‘object‘) as db:
            return db[name]
    except BaseException:
        return None

if __name__ == ‘__main__‘:
    a=np.array([1,2,3])
    writeObj(‘arr‘,a)
    print(readObj(‘arr‘))
    pass

吧一个对象持久化之后，不需要import原来对象依赖的库，就可以调用对象所有的属性、方法：