Description:

Assume I have item variable in Pywikibot being an instance of ItemPage (Wikidata item) or MediaInfo (Commons structured data). I add labels/claims to it via item.claims.setdefault('P123', []).append(claim) (in order not to make hundreds of edits) and then run:

item.editEntity(summary='my edit')

This works perfectly for ItemPage. Though, it doesn't work for MediaInfo -- labels get added, but not claims.

The reason I believe is that when data is serialized to JSON in WikibaseEntity.editEntity(), Commons API needs it to have the "claims" field -- not "statements" like Wikidata.

I currently use the following workaround for SDC:

data = item.toJSON(diffto=getattr(item, '_content', None))
data['claims'] = data['statements']
del data['statements']
commons.editEntity(item, data, summary='my edit')