擅长:python、mysql、java
<p>我建议使用<code>re</code>,它更快,更准确:</p>
<pre class="lang-py prettyprint-override"><code>>>> url = "https://ordbok.uib.no/perl/ordbok.cgi?startpos=1&ant_bokmaal=100&ant_nynorsk=5&antall_vise=1&OPP=+n1&ordbok=bokmaal&bokmaal=%2B&spraak=bokmaal"
>>> re.sub(r'(?<=ant\_bokmaal\=)\d+', str(999), url)
'https://ordbok.uib.no/perl/ordbok.cgi?startpos=1&ant_bokmaal=999&ant_nynorsk=5&antall_vise=1&OPP=+n1&ordbok=bokmaal&bokmaal=%2B&spraak=bokmaal'
</code></pre>