Hi All, I'm trying to use getpath() to get the absolute xpath for an element in a tree. This works fine when all namespaces have consistent prefixes in the document. However when I deal with a document in which the same namespace can have multiple prefixes I get wrong path. I wrote this little script to re-produce the error. #!/usr/bin/env python from lxml import etree from StringIO import StringIO def generate_sample_tree_with_multiple_prefixes(): root = etree.Element('root', nsmap={'a': 'http://a.b/c'}) for x in range(10): ns = "http://ns.org/ns/" prefix = 'l_%s' % x node = etree.SubElement(root, "{%s}l1" % ns, nsmap={prefix: ns}) node.set('id', 'id_%s' % x) return etree.parse(StringIO(etree.tostring(root))) def generate_sample_tree_with_single_prefixes(): root = etree.Element('root', nsmap={'a': 'http://a.b/c'}) for x in range(10): ns = "http://ns.org/ns/" prefix = 'ns' node = etree.SubElement(root, "{%s}l1" % ns, nsmap={prefix: ns}) node.set('id', 'id_%s' % x) return etree.parse(StringIO(etree.tostring(root))) def test_multiple(): tree = generate_sample_tree_with_multiple_prefixes() r = tree.getroot() for l1 in r.iterchildren(): path = tree.getpath(l1) ret = tree.xpath(path, namespaces=l1.nsmap) assert len(ret) == 1, "Multiple elements returned: %s" % ret assert l1 == ret[0], "It's not the same" def test_single(): tree = generate_sample_tree_with_single_prefixes() r = tree.getroot() for l1 in r.iterchildren(): path = tree.getpath(l1) ret = tree.xpath(path, namespaces=l1.nsmap) assert len(ret) == 1, "Multiple elements returned" assert l1 == ret[0], "It's not the same" if __name__ == '__main__': test_single() test_multiple() thanks -- -Ahmed