我有一个看起来像这样的 XML 文件。相关位是这样的:
<reference>
<citation>Vander Wal JS, Gang CH, Griffing GT, Gadde KM. Escitalopram for treatment of night eating syndrome: a 12-week, randomized, placebo-controlled trial. J Clin Psychopharmacol. 2012 Jun;32(3):341-5. doi: 10.1097/JCP.0b013e318254239b.</citation>
<PMID>22544016</PMID>
</reference>
我试图找到该PMID
字段的值,使用 PyQuery 来解析 XML:
from pyquery import PyQuery as pq
text = open(f, 'r').read()
d = pq(text)
data = {}
data['nct_id'] = d('nct_id').text()
print d('reference')
reference = d('reference')
print reference('PMID')
data['pmid'] = reference('PMID').text()
print data['PMID']
为什么这不起作用?在控制台中,我看到了reference
第一个打印语句的全部内容,后跟两个空值:
<reference>
<citation>Vander Wal JS, Gang CH, Griffing GT, Gadde KM. Escitalopram for treatment of night eating syndrome: a 12-week, randomized, placebo-controlled trial. J Clin Psychopharmacol. 2012 Jun;32(3):341-5. doi: 10.1097/JCP.0b013e318254239b.</citation>
<PMID>22544016</PMID>
</reference>
如示例代码所示,我可以nct_id
很好地使用找到文档中的其他叶节点(如)。.find()
PyQuery 不喜欢大写标签吗?