擅长:python、mysql、java
<p>这就是<a href="http://docs.python.org//library/random.html?highlight=random.choice#random.sample" rel="noreferrer">^{<cd1>}</a>的作用:</p>
<blockquote>
<p>Return a k length list of unique elements chosen from the population sequence. Used for random sampling without replacement.</p>
</blockquote>
<p>这可以用来选择钥匙。这些值随后可以通过普通字典查找进行检索:</p>
<pre><code>>>> d = dict.fromkeys(range(100))
>>> keys = random.sample(list(d), 10)
>>> keys
[52, 3, 10, 92, 86, 42, 99, 73, 56, 23]
>>> values = [d[k] for k in keys]
</code></pre>
<p>或者,您可以直接从<code>d.items()</code>进行采样。</p>