ZSI is the plumbing that allows Python modules to communicate via SOAP. New
in this release is the capability to consume a WSDL, and invoke methods against
the endpoint using the ServiceProxy class. This code was generously donated
by Brian Lloyd and the Zope corporation.
Also new in this release is the capability to convert the complex types and
operations defined in a WSDL document into Python modules. This makes
invocation of web services simple.