>>> res = client.service.login(username,password)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/suds-0.4-py2.7.egg/suds/client.py", line 296, in __getattr__
    port = self.__find(0)
  File "/usr/local/lib/python2.7/dist-packages/suds-0.4-py2.7.egg/suds/client.py", line 331, in __find
    raise Exception, 'No services defined'
Exception: No services defined