擅长:python、mysql、java
<p>您可以使用<code>requests</code>和<code>urlparse</code>库:</p>
<pre><code>import requests
from urlparse import parse_qs, urlsplit
r = requests.get('http://dx.doi.org/10.1109/mper.1991.88667')
print parse_qs(urlsplit(r.url).query)['arnumber'][0]
</code></pre>
<p>尽管看起来你可以:</p>
<pre><code>print 'http://dx.doi.org/10.1109/mper.1991.88667'.rpartition('.')[2]
</code></pre>