import pywikibot as pb
site = pb.Site('test', 'wikidata')
repo = site.data_repository()
labels = {"de": "asztahzZTU"}
new_item = pb.ItemPage(site)

new_item.editLabels(lables=labels)

new_item.editLabels(labels=labels)
startdate = pb.Claim(repo, u'P18')
startdate.setTarget(pb.WbTime(2016,10,8,site=site))
item = pb.ItemPage(repo, "Q25233")
item
ItemPage('Q25233')
item.addClaim(startdate)