擅长:python、mysql、java
<p>一种简单的方法是使用<code>str.lstrip</code>方法,并计算长度差。在</p>
<pre><code>s = 'ffffhuffh'
print(len(s)-len(s.lstrip('f')))
# output: 4
</code></pre>
<p><a href="https://docs.python.org/3/library/stdtypes.html#str.lstrip" rel="noreferrer">^{<cd2>}</a>:</p>
<blockquote>
<p>Return a copy of the string with leading characters removed. The chars
argument is a string specifying the set of characters to be removed.</p>
</blockquote>