擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/2/library/re.html" rel="nofollow noreferrer">re</a>模块很容易实现这一点:</p>
<pre><code>import re
x = "AvaCdefh"
" ".join([str(m.start()) for m in re.finditer("[Aa]",x)][::-1])
</code></pre>
<p>。。。产生:</p>
^{pr2}$
<p>在使用<a href="https://stackoverflow.com/questions/3940128/how-can-i-reverse-a-list-in-python">How can I reverse a list in python?</a>的第二个答案中描述的方法构造字符串之前,该列表被反转。在</p>