简明Python教程学习笔记8

12、输入输出

（1）简介

　　输入输出的方法：

  • raw_input()和print
  • 文件的读写

（2）文件

 1 # coding=utf-8
 2 poem = """\
 3 Programing is fun
 4 When the work is done
 5 if ou wanna make your work also fun:
 6         use Python!
 7 """
 8 
 9 f = file("poem.txt", "w")
10 f.write(poem)
11 f.close()
12 
13 f = file("poem.txt")
14 while True:
15     line = f.readline()
16     if len(line) == 0:
17         break
18     print line,  # 注意使用逗号，不会自动换行
19 f.close()
文件读写

输出：

当前目录新增了文件poem.txt

（3）存储器pickle

　　cpickle比pickle快很多

　　dump写

　　load读

 1 # -*- coding:utf-8 -*-
 2 
 3 
 4 import cPickle as p
 5 
 6 shoplistfile = "shoplist.data"
 7 
 8 shoplist = ["apple", "mango", "carrot"]
 9 
10 # write to the file
11 f = file(shoplistfile, "w")
12 p.dump(shoplist, f)  # dump the object to a file
13 f.close()
14 
15 del shoplist  # Remove the shoplist
16 
17 # Read back from the storage
18 f = file(shoplistfile)
19 storedlist = p.load(f)  # load the object from a file
20 f.close()
21 print storedlist
cpickle

输出：

保存的文件，可读性不好

 

posted @ 2018-01-23 10:42  七甲八甲  阅读(210)  评论(0)  编辑  收藏  举报