setSitelink with dictionary

# -*- coding: utf-8  -*-
import pywikibot
#Using dictionary
site = pywikibot.Site("test", "wikidata")
repo = site.data_repository()
item = pywikibot.ItemPage(repo, "Q210194")

sitedict = {'site':'enwiki', 'title':'Douglas Adams'}

item.setSitelink(sitedict, summary=u'Setting sitelink.')