擅长:python、mysql、java
<p><a href="http://docs.python.org/2/library/functions.html#max">max</a>和<a href="http://docs.python.org/2/library/functions.html#min">min</a>应该足够了</p>
<pre><code>min(animals, key=lambda x: animals[x]["cool_factor"]*animals[x]["popularity"])
'echidna'
max(animals, key=lambda x: animals[x]["cool_factor"]*animals[x]["popularity"])
'ostrich'
</code></pre>