[简明Python教程3.2版本实现] pickling.py

   初学Python3.2，发现与之前的Python2.x很多实现上存在差异。在此做下记录~

 

#!/usr/bin/python
# Filename : pickling.py

import pickle as p
# import pickle as p

shoplistfile = 'shoplist.data'
# the name of the file where we will shore the object

shoplist = ['apple', 'mango', 'carrot']

# Write to the file
f = open(shoplistfile, 'wb')
p.dump(shoplist, f) # dump the object to a file
f.close()

del shoplist # remove the shoplist

# Read back from the shorage
f = open(shoplistfile, 'rb')
shoredlist = p.load(f)
print(shoredlist)
print('=======================')

a1 = 'apple'
b1 = {1: 'One', 2: 'Two', 3: 'Three'}
c1 = ['apple', 'mango', 'carrot']

f1 = open('temp.pkl', 'wb')
p.dump(a1, f1)
p.dump(b1, f1)
p.dump(c1, f1)

f1.close()

f2 = open('temp.pkl', 'rb')

a2 = p.load(f2)
b2 = p.load(f2)
c2 = p.load(f2)

print(a2)
print(b2)
print(c2)

上段代码与简明教程里面的主要差异在于open函数中的'wb'及'rb',

按照教程上的'w'书写方式在python3.x版本里运行会出现异常。

 

后面教程没有的代码主要是在测试pickle的顺序储存及顺序取出特性。