Drop all namespaces in lxml?
Question
I'm working with some of google's data APIs, using the lxml library in python. Namespaces are a huge hassle here. For a lot of the work I'm doing (xpath stuff, mainly), it would be nice to just plain ignore them.
Is there a simple way to ignore xml namespaces in python/lxml?
thanks!
2 answers
solution1
1 ACCPTED 2013-07-27 12:58:48
If you'd like to remove all namespaces from elements and attributes, I suggest the code shown below.
Context: In my application I'm obtaining XML representations of SOAP response streams, but I'm not interested on building objects on the client side; I'm only interested on XML representations themselves. Moreover, I'm not interested on any namespace thing, which only makes things more complicated than they need to be, for my purposes. So, I simply remove namespaces from elements and I drop all attributes which contain namespaces.
def dropns(root):
for elem in root.iter():
parts = elem.tag.split(':')
if len(parts) > 1:
elem.tag = parts[-1]
entries = []
for attrib in elem.attrib:
if attrib.find(':') > -1:
entries.append(attrib)
for entry in entries:
del elem.attrib[entry]
# Test case
name = '~/tmp/mantisbt/test.xml'
f = open(name, 'rb')
import lxml.etree as etree
parser = etree.XMLParser(ns_clean=True, recover=True)
root = etree.parse(f, parser=parser)
print('=====================================================================')
print etree.tostring(root, pretty_print = True)
print('=====================================================================')
dropns(root)
print etree.tostring(root, pretty_print = True)
print('=====================================================================')
which prints:
=====================================================================
<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:mc_issue_getResponse>
<return xsi:type="tns:IssueData">
<id xsi:type="xsd:integer">356</id>
<view_state xsi:type="tns:ObjectRef">
<id xsi:type="xsd:integer">10</id>
<name xsi:type="xsd:string">public</name>
</view_state>
</return>
</ns1:mc_issue_getResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
=====================================================================
<Envelope>
<Body>
<mc_issue_getResponse>
<return>
<id>356</id>
<view_state>
<id>10</id>
<name>public</name>
</view_state>
</return>
</mc_issue_getResponse>
</Body>
</Envelope>
=====================================================================
solution2
-1 2012-08-09 14:47:01
In lxml some_element.tag is a string like {namespace-uri}local-name if there is a namespace, just local-name otherwise. Beware that it is a non string value on non-element nodes (such as comments).
Try this:
for node in some_tree.iter():
startswith = getattr(node 'startswith', None)
if startswith and startswith('{'):
node.tag = node.tag.rsplit('}', 1)[-1]
On Python 2.x the tag can be either an ASCII byte-string or an Unicode string. The existence of a startswith method tests for either.
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