擅长:python、mysql、java
<pre><code>from collections import Counter
hand = Counter()
def update_hand(word, hand):
for token in word:
if hand[token] == 0:
del hand[token]
else:
hand[token] -= 1
</code></pre>
<p>使用<a href="http://docs.python.org/dev/library/collections.html#collections.Counter" rel="nofollow">collections.Counter</a>使此任务变得微不足道</p>