一个简单的文件操作练习

 1 #!/usr/bin/python
 2 # -*- coding: utf-8 -*-
 3 
 4 #打开已有文件，以读写模式打开
 5 with open(‘Blowing in the wind.txt‘,‘r+‘) as f:
 6     lst_r = f.readlines()
 7 
 8 #分别插入
 9 lst_r.insert(0,‘Blowin \‘in the wind\r\n\r\n‘)    
10 lst_r.insert(1,‘Bob Dylan‘)
11 lst_r.insert(len(lst_r),‘\r\n\r\n1962 by Warner Bros. Inc.‘)
12 
13 #写入新文件
14 with open(‘Blowing in the wind_2.txt‘,‘w+‘) as f2:
15     for i in lst_r:
16         f2.write(i)
17