Question

必须删除除一个之外的所有子元素（SimpleData name =“NAME”）。

所以我想保留。

<Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#osa_20140910_areas">
    <SimpleData name="gml_id">219</SimpleData>
    <SimpleData name="ID">219</SimpleData>
    <SimpleData name="CODE">520</SimpleData>
    <SimpleData name="DISTRICT">102</SimpleData>
    <SimpleData name="STOR_DISTRICT">1</SimpleData>
    <SimpleData name="COUNTY">91</SimpleData>
    <SimpleData name="WHOLE_CODE">911102520.000000000000000</SimpleData>
    <SimpleData name="NAME">Calgary</SimpleData>
</SchemaData></ExtendedData>

感谢任何帮助。

Answer 1

您可以使用lxml中的Element.remove()删除单个元素。

from lxml import etree

tree = etree.XML('''<Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#osa_20140910_areas">
    <SimpleData name="gml_id">219</SimpleData>
    <SimpleData name="ID">219</SimpleData>
    <SimpleData name="CODE">520</SimpleData>
    <SimpleData name="DISTRICT">102</SimpleData>
    <SimpleData name="STOR_DISTRICT">1</SimpleData>
    <SimpleData name="COUNTY">91</SimpleData>
    <SimpleData name="WHOLE_CODE">911102520.000000000000000</SimpleData>
    <SimpleData name="NAME">Calgary</SimpleData>
</SchemaData></ExtendedData>
</Placemark>''')
print tree
for simple_data in tree.xpath('//SimpleData[@name!="NAME"]'):
  simple_data.getparent().remove(simple_data)

print etree.tostring(tree)

Python删除除一个之外的所有子元素

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