Comment 2 for bug 1684273

When used with the system python3-lxml package, rather than the version pip installed into a venv:

Python : sys.version_info(major=3, minor=5, micro=2, releaselevel='final', serial=0)
lxml.etree : (3, 5, 0, 0)
libxml used : (2, 9, 3)
libxml compiled : (2, 9, 2)
libxslt used : (1, 1, 28)
libxslt compiled : (1, 1, 28)