xmlrpc.client, ServerProxy and null return

[thepurpleblob]

I have a simple bit of code that accesses an XMLRPC server in this case to delete some user accounts.

def __init__(self, host, token):
    url = host + '/webservice/xmlrpc/server.php?wstoken=' + token
    self.proxy = xmlrpc.client.ServerProxy(url)

def core_user_delete_users(self, id):
    ids = [id]
    self.proxy.core_user_delete_users(ids)
    return

Now this actually works fine. The server correctly deletes the users. However, it (also) correctly returns nothing at all to the client. This (I am assuming anyway) causes an error...

Error:
File "pymoosh.py", line 62, in <module>
moodle.core_user_delete_users(id)
File "/home/howard/Repos/webservice/moodle.py", line 14, in core_user_delete_users
self.proxy.core_user_delete_users(ids)
File "/usr/lib/python3.5/xmlrpc/client.py", line 1092, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python3.5/xmlrpc/client.py", line 1432, in __request
verbose=self.__verbose
File "/usr/lib/python3.5/xmlrpc/client.py", line 1134, in request
return self.single_request(host, handler, request_body, verbose)
File "/usr/lib/python3.5/xmlrpc/client.py", line 1150, in single_request
return self.parse_response(resp)
File "/usr/lib/python3.5/xmlrpc/client.py", line 1320, in parse_response
p.close()
File "/usr/lib/python3.5/xmlrpc/client.py", line 447, in close
parser.Parse(b"", True) # end of data
xml.parsers.expat.ExpatError: no element found: line 1, column 0

As it basically works, I am assuming that this is complaining about no response being sent.

Is this the case and/or is there some way around it?