Python change xml attribute

Question

Python 2 Is it posible to change xml file using python when

<Label name="qotl_type_label" position="910,980" font="headline_light" />

Search by name attribute and then change position?

Please clarify your question. What I can understand is that you want to change an xml file (how? change what to what?), but only if.. what? Do you need assistance with checking if the a satisfies your requirement or with changing the file, or both? — YakovL
– YakovL, Commented Aug 31, 2016 at 14:14

alecxe · Accepted Answer · 2016-08-31 13:26:17Z

1

You can use the built-in xml.etree.ElementTree module to parse the XML, locate the Label element and change the position attribute via .attrib property:

>>> import xml.etree.ElementTree as ET
>>>
>>> s = '<root><Label name="qotl_type_label" position="910,980" font="headline_light" /></root>'
>>>
>>> root = ET.fromstring(s)
>>> label = root.find(".//Label[@name='qotl_type_label']")
>>> label.attrib['position'] = 'new,position'
>>> ET.tostring(root)
'<root><Label font="headline_light" name="qotl_type_label" position="new,position" /></root>'

Note that the order of attributes is not preserved, attributes are unordered by definition.

answered Aug 31, 2016 at 13:26

alecxe

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2 Comments

Jakub Janek Over a year ago

Is there a way to search only by name attribute? This will be messy in my program.

alecxe Over a year ago

@KubaJanek I've done exactly that in the code sample - see the "find()" call where we check the name attribute value.

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