New submission from Mark Baker:
The list of XPath supported features in section 20.5.2.2. "Supported XPath
syntax" on page https://docs.python.org/3.4/library/xml.etree.elementtree.html
does not list the use of a predicate based on an element value (it only list
predicates based on an attribute value. However, testing in 3.4 shows that a
predicate based on an element value also works.
>>> import xml.etree.ElementTree as etree
>>> x = '<foo><bar><baz y="bang">bing</baz></bar></foo>'
>>> y = etree.XML(x)
# Find by attribute value
>>> z = y.find('bar/baz[@y="bang"]')
>>> print(z)
<Element 'baz' at 0x0000000003300368>
# Find by element value
>>> z = y.find('bar/[baz="bing"]')
>>> print(z)
<Element 'bar' at 0x000000000334AD18>
# Find fails with incorrect element value
>>> z = y.find('bar/[baz="bong"]')
>>> z
>>> print(z)
None
Below the line that says:
[tag] Selects all elements that have a child named tag. Only immediate
children are supported.
It should say something like:
[tag="value"] Selects all elements that have a child named tag with the given
value. Only immediate children are supported.
----------
assignee: docs@python
components: Documentation
messages: 235627
nosy: docs@python, mbakeranalecta
priority: normal
severity: normal
status: open
title: XPath Support in ElementTree doc omission
type: enhancement
versions: Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23423>
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