def _fetch_top_sites()

in make_manifest.py [0:0]


def _fetch_top_sites(topsitesfile):
    with open(topsitesfile, newline='') as csvfile:
        rows = csv.reader(csvfile)
        for row in rows:
            if len(row) == 0:
                # skip empty lines
                continue
            yield (row[0], row[1])