擅长:python、mysql、java
<p>您可以使用<a href="http://www.jython.org/docs/library/random.html" rel="noreferrer">^{<cd1>} module</a>选择3到20之间的数字,并对行进行采样:</p>
<pre><code>import random
sample_size = random.randint(3, 20)
sample = random.sample(yourlist, sample_size)
for item in sample:
print '%s, %d, %s, %d' % (item.pid, item.aisle, item.bay, item.hits)
</code></pre>