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         break18     print line,  # 注意使用逗号，不会自动换行19 f.close()

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 file11 f = file(shoplistfile, "w")12 p.dump(shoplist, f)  # dump the object to a file13 f.close()14 15 del shoplist  # Remove the shoplist16 17 # Read back from the storage18 f = file(shoplistfile)19 storedlist = p.load(f)  # load the object from a file20 f.close()21 print storedlist

输出：

保存的文件，可读性不好