[lxml] Line Number of a Start Tag

21 May 2015

      Hi,

assume I have the following Python 3 code:

------------------------------
import io
from lxml import etree

source = """<?xml version="1.0"?>
<article version="5.0" xml:lang="en"
         xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>...</title>
  <para>...</para>
</article>
"""

tree = etree.parse(io.StringIO(source))
root = tree.getroot()
print(root.sourceline)
------------------------------

When I run the above code, I get "4" as a result. This is a bit
unexpected.

It seems, root.sourceline returns the line number where the start tag
_ends_. However, I need to get the line number where <article> _starts_
(here in this example "2").

How can I get the "starting" line number of a start tag?

Thanks!

-- 
Gruß/Regards,
    Thomas Schraitle