Python文件读写 - 读一个文件所有行,加工后写另一个文件

 

 1 #Filename: file_read_and_write.py
 2 #打开文件,cNames读取所有行,储存在列表中,循环对每一行在起始处加上序号1,2,3,4
 3 with open(r'file/companies.txt') as f1:
 4     cNames = f1.readlines()
 5     for i in range(0,len(cNames)):
 6         cNames[i] = str(i+1) + '.' + '' + cNames[i]
 7 
 8 #将处理过的cNames写入新的文件中
 9 with open(r'file/scompanies.txt','w') as f2:
10     f2.writelines(cNames)

 

输入: companies.txt

google
tencent
alibaba
baidu

 

输出:scompanies.txt

1.google
2.tencent
3.alibaba
4.baidu

 

posted @ 2017-12-23 15:06  huahuayu  阅读(13335)  评论(0编辑  收藏  举报