python之模块 marshal(序列化)---没理解

# -*- coding: utf-8 -*-
#python 27
#xiaodeng
#python之模块 marshal(序列化)
#来自：mldxs



import marshal
data1 = [‘abc‘,12,23,‘jb51‘]
data2 = {1:‘aaa‘,"b":‘dad‘}
data3 = (1,2,4)
 
output_file = open("a.txt",‘wb‘)#把这些数据序列化到文件中，注：文件必须以二进制模式打开
marshal.dump(data1,output_file)
marshal.dump(data2,output_file)
marshal.dump(data3,output_file)
output_file.close()
 
 
input_file = open(‘a.txt‘,‘rb‘)#从文件中读取序列化的数据
#data1 = []
data1 = marshal.load(input_file)
data2 = marshal.load(input_file)
data3 = marshal.load(input_file)
print data1#给同志们打印出结果看看
print data2
print data3
 
print ‘------------‘
outstring = marshal.dumps(data1)#marshal.dumps()返回是一个字节串，该字节串用于写入文件
open(‘out.txt‘,‘wb‘).write(outstring)
 
file_data = open(‘out.txt‘,‘rb‘).read()
real_data = marshal.loads(file_data)
print real_data