擅长:python、mysql、java
<pre><code>phrase, column = 'aaa', 3
fn = lambda l : len(l) >= column and len(l[column-1]) >= len(phrase) and phrase == l[column-1][:len(phrase)]
fp = open('output.txt', 'w')
fp.write(''.join(row for row in open('input.txt') if fn(row.split('\t'))))
fp.close()
</code></pre>