def get_from_backend(context, uri, **kwargs):
 loc = location.get_location_from_uri(uri)
 store = get_store_from_uri(context, uri, loc)
 return store.get(loc)

def get_from_backend ( context , uri , ** kwargs ) : loc = location . get_location_from_uri ( uri ) store = get_store_from_uri ( context , uri , loc ) return store . get ( loc )
yields chunks of data from backend specified by uri .