擅长:python、mysql、java
<p>如果我正确理解您的问题,您可以在python中使用<code>random.sample()</code>:</p>
<pre><code>import random
pool = set(["foo", "bar", "baz", "123", "456", "789"]) # your 240 elements here
slen = len(pool) / 3 # we need 3 subsets
set1 = set(random.sample(pool, slen)) # 1st random subset
pool -= set1
set2 = set(random.sample(pool, slen)) # 2nd random subset
pool -= set2
set3 = pool # 3rd random subset
</code></pre>