擅长:python、mysql、java
<p>使用<a href="http://docs.python.org/2/library/sets.html" rel="nofollow">^{<cd1>}</a>检查好友列表的交集:</p>
<pre><code>In [352]: lst1=friends_of_person['Albus']
In [353]: lst2=friends_of_person['Harry']
In [354]: lst1
Out[354]: ['Ron', 'Hermione']
In [355]: lst2
Out[355]: ['Ron', 'Hermione', 'Neville']
In [356]: set(lst1)&set(lst2)
Out[356]: set(['Hermione', 'Ron'])
</code></pre>