# -*- coding: utf-8 -*-
import re

r=re.compile(r'(\d\d\d\d)-\1')

def fix_repeated_date(doc):
    dates = doc['sourceResource'].get('date', None)
    if dates:
        if isinstance(dates, list):
            new_dates = []
            for d in dates:
                disp_date =  d.get('displayDate', '')
                if r.match(disp_date):
                    new_dd = r.match(disp_date).group(1)
                    d['displayDate'] = new_dd
                new_dates.append(d)
        doc['sourceResource']['date'] = new_dates
    return doc

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Fix for display date repeat of YYYY
Fix for display date repeat of YYYY
