[lxml-dev] Bug in XPath evaluation

[Torsten Rehn]

Hi list,

here's what I have:

poc.xml:

<?xml version="1.0" encoding="utf-8" ?>
<myrootnode>
        <myns:mynode xmlns:myns="http.//www.example.com/myns">
                <myns:mysubnode>some text</myns:mysubnode>
        </myns:mynode>
</myrootnode>

poc.py:

#!/usr/bin/env python
from lxml import etree
DocTree = etree.parse("poc.xml")
QueryResult = DocTree.xpath("//myns:mynode")

The result (with added version info):

[gentop][scel@/home/scel/workspace/lxmlbug] > ./poc.py 
lxml.etree:        (1, 2, 1, 0)
libxml used:       (2, 6, 27)
libxml compiled:   (2, 6, 27)
libxslt used:      (1, 1, 17)
libxslt compiled:  (1, 1, 17)
Traceback (most recent call last):
  File "./poc.py", line 9, in ?
    QueryResult = DocTree.xpath("//myns:mynode")
  File "etree.pyx", line 1256, in etree._ElementTree.xpath
  File "xpath.pxi", line 75, in etree._XPathEvaluatorBase.evaluate
  File "xpath.pxi", line 212, in etree.XPathDocumentEvaluator.__call__
  File "xpath.pxi", line 105, in etree._XPathEvaluatorBase._handle_result
  File "xpath.pxi", line 93, in etree._XPathEvaluatorBase._raise_parse_error
etree.XPathSyntaxError: error in xpath expression

The expression however, is valid (or I'm just insanely stupid).
I tested the same query on the same data using 
http://dmag.upf.edu/contorsion/query.jsp and it worked just as it should.
Strangely, //*[name()='myns:mynode'] works with lxml.

Regards, 
	Torsten
-- 
Torsten Rehn <scel at users.sourceforge.net>
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