擅长:python、mysql、java
<p>您可以对文件进行迭代,并将行和索引用于您的优势;如下所示:</p>
<pre><code>with open(output_filename, 'r') as f:
for index, line in enumerate(f):
# here you have access to each line and its index
# so you can save any number of lines you wish
</code></pre>