擅长:python、mysql、java
<p>您可以使用<code>\g<number of group></code>(<a href="https://docs.python.org/3.5/library/re.html#re.sub" rel="nofollow noreferrer">doc</a>)。从文件:</p>
<blockquote>
<p>... \g uses the corresponding group number; \g<2> is therefore
equivalent to \2, but isn’t ambiguous in a replacement such as \g<2>0.
\20 would be interpreted as a reference to group 20, not a reference
to group 2 followed by the literal character '0'. The backreference
\g<0> substitutes in the entire substring matched by the RE.</p>
</blockquote>
<pre><code>import re
s = 'This will insert 0 between AB'
print( re.sub(r'([A-Z])([A-Z])', r'\g<1>0\g<2>', s) )
</code></pre>
<p>印刷品:</p>
<pre><code>This will insert 0 between A0B
</code></pre>