Exception in: lxml.etree._Element.__dealloc__

[andresgleztelo]

I get this error when using the signing module or running the provided tests:
AssertionError: Tried to unregister unknown proxy
File "src/lxml/proxy.pxi", line 43, in lxml.etree._unregisterProxy (src/lxml/lxml.etree.c:11048)

Any idea what's causing this? I'm running it using either python2.7 or 3.5 and lxml 3.6.4, on Mac OS X EL Capitan or Ubuntu 14.04

[mvantellingen]

I ran into the same issue when implementing wsse in zeep

The solution was to use the xmlsec functions to inject the issuer and certificate instead of manually inserting it via lxml. See

https://github.com/orcasgit/py-wsse/blob/master/wsse/signing.py#L120
vs
https://github.com/mvantellingen/python-zeep/blob/master/src/zeep/wsse/signature.py#L154