cleanup_namespaces不会从XML中删除名称空间

Question

这是我的xml字符串

xml = '''
<exta>
<signature>This </signature>
<begin_date>2019-07-12T09:41:48.187</begin_date>
<ver>4</ver>
<maiden_bc>1549</maiden_bc>
<exta_id>12345</exta_id>
<nps_max_price xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<exta_id>72723</exta_id>
<extended_datetime>2018-11-20T11:01:29.040</extended_datetime>
<event_ind>E</event_ind>
<maiden>12345</maiden>
<patient_id>123</patient_id>
<boss_id>123LHF</boss_id>
<template_name/>
<end_date>2019-01-01T00:00:00</end_date>
<UYI_AMN xsi:nil="true"/>
<dedt_bef_ATS xsi:nil="true"/>
<form>W</form>
</nps_max_price>
</exta>
'''

我使用cleanup_namespaces从xml字符串中删除命名空间

from lxml import etree
root = etree.fromstring(xml)
for elem in root.getiterator():
elem.tag = etree.QName(elem).localname
etree.cleanup_namespaces(root)
print(etree.tostring(root).decode())

这给了我:

<exta>
<signature>This </signature>
<begin_date>2019-07-12T09:41:48.187</begin_date>
<ver>4</ver>
<maiden_bc>1549</maiden_bc>
<exta_id>12345</exta_id>
<nps_max_price xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<exta_id>72723</exta_id>
<extended_datetime>2018-11-20T11:01:29.040</extended_datetime>
<event_ind>E</event_ind>
<maiden>12345</maiden>
<patient_id>123</patient_id>
<boss_id>123LHF</boss_id>
<template_name/>
<end_date>2019-01-01T00:00:00</end_date>
<UYI_AMN xsi:nil="true"/>
<dedt_bef_ATS xsi:nil="true"/>
<form>W</form>
</nps_max_price>
</exta>

但是预期的输出是xml，没有名称空间xmlns:xsi, xsi:nil, xsd etc。我该怎么做呢?

预期输出:

<exta>
<signature>This </signature>
<begin_date>2019-07-12T09:41:48.187</begin_date>
<ver>4</ver>
<maiden_bc>1549</maiden_bc>
<exta_id>12345</exta_id>
<nps_max_price>
<exta_id>72723</exta_id>
<extended_datetime>2018-11-20T11:01:29.040</extended_datetime>
<event_ind>E</event_ind>
<maiden>12345</maiden>
<patient_id>123</patient_id>
<boss_id>123LHF</boss_id>
<template_name/>
<end_date>2019-01-01T00:00:00</end_date>
<UYI_AMN/>
<dedt_bef_ATS/>
<form>W</form>
</nps_max_price>
</exta>

Answer 1

问题中的代码从元素中删除了名称空间。但是在XML字符串中，没有任何元素绑定到名称空间。这就是为什么什么都没变。

然而，有两个命名空间属性(xsi:nil)。如果您只是想删除这些属性(或任何带有名称空间的属性)，可以这样做:

for elem in root.iter():      
for attr in elem.attrib:
if etree.QName(attr).namespace:
del elem.attrib[attr]
etree.cleanup_namespaces(root)