擅长:python、mysql、java
<p>使用<code>collections.Counter</code>:</p>
<pre><code>>>> from collections import Counter
>>> c = Counter()
>>> vowels = {'a', 'e', 'i', 'o', 'u'}
for x in 'aaaeeeeeefffddd':
if x.lower() in vowels:
c[x.lower()] += 1
...
>>> c
Counter({'e': 6, 'a': 3})
>>> letter, count = c.most_common()[0]
>>> letter, count
('e', 6)
</code></pre>