[lxml-dev] Behaviour of Element.iter() changes when removing a node depending on whether the node has children or not

[Geoffrey Sneddon]

Hi (and sorry for the stupidly long subject, but otherwise it doesn't  
actually cover the subject),

I'm not sure whether this is a bug or not (if not, there probably  
ought to be some note in the docs), but, for example:

 >>> from lxml import etree
 >>> foo = etree.fromstring("<root><a><b/></a><a/></root>")
 >>> for element in foo.iter(etree.Element):
...     print element.tag
...     if element.tag == "a":
...             element.getparent().remove(element)
...
root
a
b
 >>> foo = etree.fromstring("<root><a/><a/></root>")
 >>> for element in foo.iter(etree.Element):
...     print element.tag
...     if element.tag == "a":
...             element.getparent().remove(element)
...
root
a
a

Only in the latter case does the final a element actually appear in  
the iteration, whereas in the former case it just vanishes. What  
changes the behaviour is the fact that in former case the first a  
element has a child: an empty b element.


--
Geoffrey Sneddon
<http://gsnedders.com/>