擅长:python、mysql、java
<p>下面</p>
<pre><code>import requests
import xml.etree.ElementTree as ET
response = requests.get('https://clinicaltrials.gov/api/query/study_fields?max_rnk=1000&expr=(AREA[OverallStatus]Recruiting+AND+cholangiocarcinoma+OR+AREA[OverallStatus]%5C%22Not+Yet+Recruiting%5C%22+AND+cholangiocarcinoma)+AND+NOT+AREA[OverallStatus]Active,+not+recruiting')
if response.status_code == 200:
root = ET.fromstring(response.text)
studies_avail_elem = root.find('.//NStudiesAvail')
if studies_avail_elem is not None:
studies_avail = studies_avail_elem.text
print('Num of available studies: {}'.format(studies_avail))
</code></pre>
<p>输出</p>
<pre><code>Num of available studies: 317735
</code></pre>