擅长:python、mysql、java
<p>看起来不错。您可以使用<a href="http://docs.python.org/library/collections.html#collections.defaultdict" rel="nofollow">^{<cd1>}</a>将其简化一点:</p>
<pre><code>import collections
def revert_dict(d):
rd = collections.defaultdict(list)
for key, value in d.iteritems():
rd[value].append(key)
return rd
</code></pre>