python pickle模块：python变量及对象的序列化

1、pickle.dump

     将python变量保存为二进制文件

2、pickle.load 

     从二进制文件中读到python变量

3、pickle.dumps

     将python对象序列化保存为变量

4、pickle.loads

     对python变量反序列化为python对象

# -*- coding:utf-8 -*-

import pickle

class Bar(object):

    def __init__(self):

        self.close=5000

        self.open=6000

        self.high=4000

        self.low=4000

        self.datetime='2018-08-09 07:00:00'

    def show(self):

        print(self.__dict__)

bar=Bar()

bar.show()

f=open('pickle.pkl','wb')

pickle.dump(bar,f)

f=open('pickle.pkl','rb')

g=pickle.load(f)

print(g)