擅长:python、mysql、java
<p>这是一个<a href="http://docs.python.org/2/reference/expressions.html#conditional-expressions" rel="nofollow">conditional expression</a>见<a href="http://docs.python.org/2.5/whatsnew/pep-308.html" rel="nofollow">PEP-308</a>。你知道吗</p>
<p>像这样的事情</p>
<pre><code>x = true_value if condition else false_value
</code></pre>
<p>也可以写成</p>
<pre><code>if condition:
x = true_value
else:
x = false_value
</code></pre>