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"> </code> </div><div class="line number9 index8 alt2"><code class="py spaces"> </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"> </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"> </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"> </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"> </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"> </code><code class="py keyword">else</code><code class="py plain">:</code></div><div class="line number15 index14 alt2"><code class="py spaces"> </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"> </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"> </div><div class="line number18 index17 alt1"><code class="py spaces"> </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"> </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"> </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"> </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"> </code><code class="py plain">newfile.write(newData)</code></div><div class="line number23 index22 alt2"><code class="py spaces"> </code><code class="py keyword">if</code> <code class="py functions">len</code><code class="py plain">(data) < </code><code class="py value">200</code><code class="py plain">:</code></div><div class="line number24 index23 alt1"><code class="py spaces"> </code><code class="py keyword">break</code></div><div class="line number25 index24 alt2"><code class="py spaces"> </code><code class="py plain">newfile.close()</code></div><div class="line number26 index25 alt1"><code class="py spaces"> </code><code class="py plain">oldfile.close()</code></div><div class="line number27 index26 alt2"><code class="py spaces"> </code> </div><div class="line number28 index27 alt1"><code class="py spaces"> </code><code class="py plain">os.remove(filePath)</code></div><div class="line number29 index28 alt2"><code class="py spaces"> </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。