擅长:python、mysql、java
<p>你可以试试这个:</p>
<pre><code>>>> import re
>>> from collections import Counter
>>> my_string = "HHHHello World!!!!!!!!!!"
>>> Counter("".join(re.findall("[a-z]+",my_string.lower()))).most_common(1)
[('h', 4)]
</code></pre>