In Python you simply don't have good SOAP libraries. They were all started at the tail end of its popularity and then all died quiet deaths when attention shifted to ReST before they were actually production ready, and if you now want to talk to a SOAP service… well, better don't do it in Python. 2, that is. Forget about 3.
Nope. We needed one last September, zeep didn't yet exist back then.
And going by the bugtracker, it's running into quite a few problems with almost-but-not-quite compliant servers/WSDL files, which is a real issue when you're trying to interface ass-old legacy APIs (we're talking "not upgraded since 2006"-old) made by $BigEnterprise. Maybe this time the project won't die before they work out all the little kinks.