由于命名空间的原因，找不到标题元素。在

下面是要查找的示例代码：“文档”标签中的标题

来自内部“组件”标签的标题import xml.etree.ElementTree as ET

import urllib.request

url = 'https://dailymed.nlm.nih.gov/dailymed/services/v2/spls/fe9e8b7d-61ea-409d-84aa-3ebd79a046b5.xml'

response = urllib.request.urlopen(url).read()

tree = ET.fromstring(response)

for docTitle in tree.findall('{urn:hl7-org:v3}title'):

print(docTitle.text)

for compTitle in tree.findall('.//{urn:hl7-org:v3}title'):

print(compTitle.text)

更新

示例：

^{pr2}$

此示例打印ID为829076996的作者名

更新2

您可以使用findall方法轻松处理所有assignedEntity标记。

对于每种方法，您可以有多个产品，因此需要另一个findall方法(参见下面的示例)。在xPathAssignedEntities = ''.join([

".//",

NS, "author/",

NS, "assignedEntity/",

NS, "representedOrganization/",

NS, "assignedEntity/",

NS, "assignedOrganization/",

NS, "assignedEntity"

])

xPathProdCode = ''.join([

NS, "actDefinition/",

NS, "product/",

NS, "manufacturedProduct/",

NS, "manufacturedMaterialKind/",

NS, "code"

])

# GET ALL assignedEntity TAGS

for assignedEntity in tree.findall(xPathAssignedEntities):

# GET ID AND NAME OF assignedEntity

id = assignedEntity.find(NS + 'assignedOrganization/'+ NS + 'id').get('extension')

name = assignedEntity.find(NS + 'assignedOrganization/' + NS + 'name').text

# FOR EACH assignedEntity WE CAN HAVE MULTIPLE TAGS

for performance in assignedEntity.findall(NS + 'performance'):

actCode = performance.find(NS + 'actDefinition/'+ NS + 'code').get('displayName')

prodCode = performance.find(xPathProdCode).get('code')

print(id, '\t', name, '\t', actCode, '\t', prodCode)

结果是：829084545 Pfizer Pharmaceuticals LLC ANALYSIS 0049-0050

829084545 Pfizer Pharmaceuticals LLC ANALYSIS 0049-4900

829084545 Pfizer Pharmaceuticals LLC ANALYSIS 0049-4910

829084545 Pfizer Pharmaceuticals LLC ANALYSIS 0049-4940

829084545 Pfizer Pharmaceuticals LLC ANALYSIS 0049-4960

829084545 Pfizer Pharmaceuticals LLC API MANUFACTURE 0049-0050

829084545 Pfizer Pharmaceuticals LLC API MANUFACTURE 0049-4900

829084545 Pfizer Pharmaceuticals LLC API MANUFACTURE 0049-4910

829084545 Pfizer Pharmaceuticals LLC API MANUFACTURE 0049-4940

829084545 Pfizer Pharmaceuticals LLC API MANUFACTURE 0049-4960

829084545 Pfizer Pharmaceuticals LLC MANUFACTURE 0049-4900

829084545 Pfizer Pharmaceuticals LLC MANUFACTURE 0049-4910

829084545 Pfizer Pharmaceuticals LLC MANUFACTURE 0049-4960

829084545 Pfizer Pharmaceuticals LLC PACK 0049-4900

829084545 Pfizer Pharmaceuticals LLC PACK 0049-4910

829084545 Pfizer Pharmaceuticals LLC PACK 0049-4960

618054084 Pharmacia and Upjohn Company LLC ANALYSIS 0049-0050

618054084 Pharmacia and Upjohn Company LLC ANALYSIS 0049-4940

829084552 Pfizer Pharmaceuticals LLC PACK 0049-4900

829084552 Pfizer Pharmaceuticals LLC PACK 0049-4910

829084552 Pfizer Pharmaceuticals LLC PACK 0049-4960