I'd strongly suggest you consider zeep.

Several years back suds was completely abandoned, and many forks appeared, each fixing different bugs, and only some adding support for python3. It was a bit of a mess, because each fork fixed a different bug from the original suds, and only some were python3 compatible. You'd often need two different libraries which each relied on a different fork of suds, and ended up deadlocked.

Eventually, zeep seemed to come out as a champion: it included all the fixes from most of the forks out there, and good support for Python3. It also has been actively maintained over the years really well, and has had a lot of improvements.

I maintained one of those forks for a few years too, but I've since killed it pointing users to zeep as a better replacement, and recommend others do the same.

@WhyNotHugo I'm completely in favour of switching to zeep - but I don't know what's involved and there's no tests for this code.

suds-community 1.0.0 was released now so should just work