擅长：python、mysql、java
<p>你的交易需要一些工具</p>
<ol>
<li><a href="http://docs.python.org/library/stdtypes.html#string-methods" rel="nofollow">str.startswith</a></li>
<li><a href="http://docs.python.org/library/stdtypes.html#string-methods" rel="nofollow">str.join</a>或仅<code>+</code>（字符串合并）</li>
<li><a href="http://docs.python.org/library/stdtypes.html#file.readline" rel="nofollow">readline</a>按顺序读取文件</li>
<li><a href="http://docs.python.org/release/2.2.3/lib/bltin-file-objects.html" rel="nofollow">Offcourse opening and closing a file</a></li>
<li><a href="http://docs.python.org/release/2.2.3/lib/bltin-file-objects.html" rel="nofollow">write a file</a></li>
</ol>
