In version 0.3.9 of suds, the following in a WSDL file:
fails with an error that it couldn't find "/Basic.xsd"
I think the problem is the two lines in sxbasic.py that look like
"if '://' not in url:"
I replaced this with
"if ':' not in url:"
and it worked for me, though I don't know enough about XML schemas to know if that's legit for everyone.
Thanks!
-Chris