擅长:python、mysql、java
<p>使用<a href="https://docs.djangoproject.com/en/1.4/ref/models/querysets/#iterator" rel="nofollow">iterator()</a>。但别忘了它不会缓存结果。在</p>
<blockquote>
<p>For a QuerySet which returns a large number of objects that you only
need to access once, this can result in better performance and a
significant reduction in memory.</p>
</blockquote>