An http SOAP webservice like the SDM webservice is not programming language dependent by intention.
I assume, there is a problem with your python webservice client implementation/library, who is not able to map the given python array/list to the correct/expected XML ArrayOfString structure for the actual webservice http request.
I suggest , that you check the real sent request which is sent by your python program, and check if it looks like as it should.
maybe the following similar post, might help somehow:
https://bytes.com/topic/python/answers/590973-soappy-arrayofstring
best regards
.....Michael