wsdl_url = 'https://example.com/ChangeRequest.do?WSDL'
self.client = Client(wsdl_url, username=username, password=password)

from suds.transport.https import HttpAuthenticated

wsdl_url = 'https://example.com/ChangeRequest.do?WSDL'
credentials = dict(username=username, password=password)
t = HttpAuthenticated(**credentials)
self.client = Client(url=wsdl_url, transport=t)

u2request.add_header('Authorization','Basic xxxxxxxxxxxxxxxxxxxx')

client.set_options(headers={'Host': 'value'})

import urllib2
import suds
from suds.transport.https import HttpAuthenticated
from suds.transport import TransportError

URL = 'https://example.com/ChangeRequest.do?WSDL'

class HttpHeaderModify(HttpAuthenticated):
    def open(self, request):
        try:
            url = request.url
            log.debug('[dragonpay_payout_v2]suds_client_opening_url:%s', url)
            u2request = urllib2.Request(url, headers={'User-Agent': 'Mozilla'})
            self.proxy = self.options.proxy
            return self.u2open(u2request)
        except urllib2.HTTPError, e:
            raise TransportError(str(e), e.code, e.fp)

transport = HttpHeaderModify()
client = Client(dragonpay_settings.URL, transport=transport, timeout=10)

# Subsequent requests' header needs to be set again here. The overridden transport
# class only handles opening of the client.
client.set_options(headers={'User-Agent': 'Mozilla'})