博客
关于我
Python \r\n与\n的转换
阅读量:795 次
发布时间:2023-03-06

本文共 5027 字,大约阅读时间需要 16 分钟。

原文链接[脚本之家](http://www.jb51.net/article/64669.htm)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
import
os
 
def
replace(filePath, w2u):
  
try
:
    
oldfile
=
open
(filePath,
"rb+"
)    
#这里必须用b打开
    
path, name
=
os.path.split(filePath)
    
newfile
=
open
(path
+
'$'</code> <code class="py keyword">+</code> <code class="py plain">name, </code><code class="py string">"ba+"</code><code class="py plain">)</code></div><div class="line number8 index7 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</div><div class="line number9 index8 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">old </code><code class="py keyword">=</code> <code class="py plain">b''</code></div><div class="line number10 index9 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">new </code><code class="py keyword">=</code> <code class="py plain">b''</code></div><div class="line number11 index10 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py keyword">if</code> <code class="py plain">w2u </code><code class="py keyword">=</code><code class="py keyword">=</code> <code class="py color1">True</code><code class="py plain">:</code></div><div class="line number12 index11 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">old </code><code class="py keyword">=</code> <code class="py plain">b</code><code class="py string">'\r'</code></div><div class="line number13 index12 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">new </code><code class="py keyword">=</code> <code class="py plain">b''</code></div><div class="line number14 index13 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py keyword">else</code><code class="py plain">:</code></div><div class="line number15 index14 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">old </code><code class="py keyword">=</code> <code class="py plain">b</code><code class="py string">'\n'</code></div><div class="line number16 index15 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">new </code><code class="py keyword">=</code> <code class="py plain">b</code><code class="py string">'\r\n'</code></div><div class="line number17 index16 alt2">&nbsp;</div><div class="line number18 index17 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">data </code><code class="py keyword">=</code> <code class="py plain">b''</code></div><div class="line number19 index18 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py keyword">while</code> <code class="py plain">(</code><code class="py color1">True</code><code class="py plain">):</code></div><div class="line number20 index19 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">data </code><code class="py keyword">=</code> <code class="py plain">oldfile.read(</code><code class="py value">200</code><code class="py plain">)</code></div><div class="line number21 index20 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">newData </code><code class="py keyword">=</code> <code class="py plain">data.replace(old, new)</code></div><div class="line number22 index21 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">newfile.write(newData)</code></div><div class="line number23 index22 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py keyword">if</code> <code class="py functions">len</code><code class="py plain">(data) &lt; </code><code class="py value">200</code><code class="py plain">:</code></div><div class="line number24 index23 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py keyword">break</code></div><div class="line number25 index24 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">newfile.close()</code></div><div class="line number26 index25 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">oldfile.close()</code></div><div class="line number27 index26 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</div><div class="line number28 index27 alt1"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">os.remove(filePath)</code></div><div class="line number29 index28 alt2"><code class="py spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="py plain">os.rename(path </code><code class="py keyword">+</code> <code class="py string">'$'
+
name, filePath)
  
except
IOError as e:
    
print
(e)
     
if
__name__
=
=
"__main__"
:
  
print
(
"请输入文件路径:"
)
  
filePath
=
input
()
  
replace(filePath,
False
#这个改为True就可以实现\n变成\r\n

要注意的是,在python里,像\r\n这样的符号,如果是文本打开的话,是找不到\r\n的,而只能找到’\n’,所以必须用b(二进制)模式打开。

您可能感兴趣的文章:

转载地址:http://xgafk.baihongyu.com/

你可能感兴趣的文章
mysql_real_connect 参数注意
查看>>
mysql_secure_installation初始化数据库报Access denied
查看>>
MySQL_西安11月销售昨日未上架的产品_20161212
查看>>
Mysql——深入浅出InnoDB底层原理
查看>>
MySQL“被动”性能优化汇总
查看>>
MySQL、HBase 和 Elasticsearch:特点与区别详解
查看>>
MySQL、Redis高频面试题汇总
查看>>
MYSQL、SQL Server、Oracle数据库排序空值null问题及其解决办法
查看>>
mysql一个字段为空时使用另一个字段排序
查看>>
MySQL一个表A中多个字段关联了表B的ID,如何关联查询?
查看>>
MYSQL一直显示正在启动
查看>>
MySQL一站到底!华为首发MySQL进阶宝典,基础+优化+源码+架构+实战五飞
查看>>
MySQL万字总结!超详细!
查看>>
Mysql下载以及安装(新手入门,超详细)
查看>>
MySQL不会性能调优?看看这份清华架构师编写的MySQL性能优化手册吧
查看>>
MySQL不同字符集及排序规则详解:业务场景下的最佳选
查看>>
Mysql不同官方版本对比
查看>>
MySQL与Informix数据库中的同义表创建:深入解析与比较
查看>>
mysql与mem_细说 MySQL 之 MEM_ROOT
查看>>
MySQL与Oracle的数据迁移注意事项,另附转换工具链接
查看>>