Remove node from XML node based an attribute value in Python

Question

I am trying to remove a node based on it's attribute value


from xml.etree import ElementTree as ET

groups = ET.fromstring("""<groups>
<group>
<group_components>
<id item="1">14742</id>
<id item="1">121727</id>
<id item="0">541971</id>
</group_components>
</group>
<group>
<group_components>
<id item="1">10186</id>
<id item="1">10553</id>
<id item="1">10644</id>
<id item="0">434639</id>
</group_components>
</group>
</groups>
""")


fnodes = groups.findall('group')
for first in fnodes:
    bnode = first.find("group_components")
    for child in bnode:
        items = child.attrib.get('item')
        if items == "1":
            bnode.remove(child)
            
xmlstr = ET.tostring(groups, encoding="utf-8", method="xml")
print(xmlstr.decode("utf-8"))

The above code is only removing single node. If the attribute item =1 that id node should be removed

which elements should be removed?

balderman
– balderman

2021-08-23 11:55:21 +00:00
Commented Aug 23, 2021 at 11:55 — balderman
– balderman, Commented Aug 23, 2021 at 11:55

balderman · Accepted Answer · 2021-08-23 11:59:53Z

See below

from xml.etree import ElementTree as ET

xml = """<groups>
<group>
    <group_components>
        <id item="1">14742</id>
        <id item="1">121727</id>
        <id item="0">541971</id>
    </group_components>
    </group>
<group>
    <group_components>
        <id item="1">10186</id>
        <id item="1">10553</id>
        <id item="1">10644</id>
        <id item="0">434639</id>
    </group_components>
</group>
</groups>
"""
root = ET.fromstring(xml)
for grp_comp in root.findall('.//group_components'):
    for _id in list(grp_comp):
        if _id.attrib['item'] == "1":
            grp_comp.remove(_id)
ET.dump(root)

output

<groups>
<group>
    <group_components>
        <id item="0">541971</id>
    </group_components>
    </group>
<group>
    <group_components>
        <id item="0">434639</id>
    </group_components>
</group>
</groups>

TSnake · Accepted Answer · 2021-08-23 12:02:52Z

2

to_remove = ['<id item="1">']
with open('xmlfile.xml') as xmlfile, open('newfile.xml', 'w') as newfile:
    for line in xmlfile:
        if not any(remo in line for remo in to_remove):
            newfile.write(line)

You can put your xml file and get the new xml file with <id item="1"> removed. No need of element tree here I guess.

answered Aug 23, 2021 at 12:02

TSnake

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1 Comment

Narik Over a year ago

Looks great and handy but the solution provided by @balderman is apt for my project. Thanks

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