working code

import os
from urllib import parse
from urllib.request import pathname2url
from suds.client import Client
from suds.transport.http import HttpAuthenticated


sessionID = None
client = None
def initiate_conn(hostUrl, username, password):
	global sessionID
	global client

	host = hostUrl+'/soap'
	wsdl_file = parse.urljoin('file:', pathname2url(os.path.abspath("soap_bindings/hpna10_11_api.wsdl.soappy")))
	t = HttpAuthenticated(username=username, password=password)

	client = Client(wsdl_file, transport=t)
	client.set_options(location=host)

	request = client.factory.create('loginInputParms')
	request.username = username
	request.password = password
	authObject = client.service.login(request)
	sessionID = authObject.Text