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lxml etree xmlparser remove unwanted namespace

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感动是毒
感动是毒 2020-11-29 00:04

I have an xml doc that I am trying to parse using Etree.lxml


  

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  • 南方客
    2020-11-29 00:08 
    import io
import lxml.etree as ET

content='''\
<Envelope xmlns="http://www.example.com/zzz/yyy">
  <Header>
    <Version>1</Version>
  </Header>
  <Body>
    some stuff
  </Body>
</Envelope>
'''    
dom = ET.parse(io.BytesIO(content))

    You can find namespace-aware nodes using the xpath method:

    body=dom.xpath('//ns:Body',namespaces={'ns':'http://www.example.com/zzz/yyy'})
print(body)
# [<Element {http://www.example.com/zzz/yyy}Body at 90b2d4c>]

    If you really want to remove namespaces, you could use an XSL transformation:

    # http://wiki.tei-c.org/index.php/Remove-Namespaces.xsl
xslt='''<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="no"/>

<xsl:template match="/|comment()|processing-instruction()">
    <xsl:copy>
      <xsl:apply-templates/>
    </xsl:copy>
</xsl:template>

<xsl:template match="*">
    <xsl:element name="{local-name()}">
      <xsl:apply-templates select="@*|node()"/>
    </xsl:element>
</xsl:template>

<xsl:template match="@*">
    <xsl:attribute name="{local-name()}">
      <xsl:value-of select="."/>
    </xsl:attribute>
</xsl:template>
</xsl:stylesheet>
'''

xslt_doc=ET.parse(io.BytesIO(xslt))
transform=ET.XSLT(xslt_doc)
dom=transform(dom)

    Here we see the namespace has been removed:

    print(ET.tostring(dom))
# <Envelope>
#   <Header>
#     <Version>1</Version>
#   </Header>
#   <Body>
#     some stuff
#   </Body>
# </Envelope>

    So you can now find the Body node this way:

    print(dom.find("Body"))
# <Element Body at 8506cd4>
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  • 日久生厌
    2020-11-29 00:12

    Try using Xpath:

    dom.xpath("//*[local-name() = 'Body']")

    Taken (and simplified) from this page, under "The xpath() method" section

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  • 梦毁少年i
    2020-11-29 00:14

    You're showing the result of the repr() call. When you programmatically move through the tree, you can simply choose to ignore the namespace.

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  • 孤街浪徒
    2020-11-29 00:15

    The last solution from https://bitbucket.org/olauzanne/pyquery/issue/17 can help you to avoid namespaces with little effort

    apply xml.replace(' xmlns:', ' xmlnamespace:') to your xml before using pyquery so lxml will ignore namespaces

    In your case, try xml.replace(' xmlns="', ' xmlnamespace="'). However, you might need something more complex if the string is expected in the bodies as well.

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