[issue29050] xml.etree.ElementTree in Python 3.6 is incompatible with defusedxml
Adam Williamson
report at bugs.python.org
Thu Dec 22 15:13:35 EST 2016
Adam Williamson added the comment:
Aha, so thanks to my colleague Patrick Uiterwijk, we see the problem. Since Python 3.3, Python doesn't actually use that pure-Python iterparse() function if it can instead replace it with a C version:
https://github.com/python/cpython/blob/3.3/Lib/xml/etree/ElementTree.py#L1705
"# Overwrite 'ElementTree.parse' and 'iterparse' to use the C XMLParser"
so the reason defusedxml wants to use _IterParseIterator on Python 3 is because if it just uses xml.etree.ElementTree.iterparse() it's getting the 'accelerated' C implementation, not the pure-Python implementation it wants.
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<http://bugs.python.org/issue29050>
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