擅长:python、mysql、java
<pre><code>>> s = "aaabbbb"
>> len(s) - len(s.rstrip(s[-1]))
4
</code></pre>
<p>从<a href="https://docs.python.org/3.4/library/stdtypes.html#str.rstrip" rel="nofollow">^{<cd1>}</a>的docstring</p>
<blockquote>
<p><code>S.rstrip([chars])</code> -> string or unicode</p>
<p>Return a copy of the string S with trailing whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is unicode, S will be converted to unicode before stripping</p>
</blockquote>
<p>所以这个解决方案取原始字符串的长度,并从中减去一个字符串的长度,其中所有相同的最后一个字符都被去除。你知道吗</p>