New submission from Martin Hosken <martin_hos...@sil.org>:
This is a regression from python2 by being forced to use cElementTree.
I have code that uses iterparse to process an XML file, but I also want to
process comments and so I have a comment handling function called by the parser
during iterparse. Under python3 I can find no way to achieve the same thing:
```
parser = et.XMLParser(target=et.TreeBuilder())
parser.parser.CommentHandler = myCommentHandler
for event, elem in et.iterparse(fh, parser=parser):
...
```
Somewhat ugly but works in python2, but I can find no way to set a comment
handler on the parser in python3.
1. There is no way(?) to get to xml.etree.ElementTree.XMLParser since the C
implementation completely masks the python versions.
2. It is possible to create a subclass of TreeBuilder to add a comment method.
But the C version XMLParser requires that its TreeBuilder not be a subclass,
when used in iterparse.
The only solution I found was to copy the XMLParser code out of ElementTree
into a private module and use that pure python implementation.
Suggested solutions:
1. Allow access to all the python implementations in ElementTree and not just
Element.
2. Allow a comments method to be passed to the XMLParser on creation.
Thank you.
----------
components: XML
messages: 324719
nosy: Martin Hosken
priority: normal
severity: normal
status: open
title: python3 regression ElementTree.iterparse() unable to capture comments
type: behavior
versions: Python 3.6
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34600>
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