Update find_old_pages

wikibot.py

@@ -33,5 +33,9 @@ def find_old_pages(timedelta, namespace=""):
 	with Proxy(config.WIKI_API_URL) as proxy:
 		pages = proxy.dokuwiki.getPagelist(namespace)
 		proxy_time = proxy.dokuwiki.getTime()
-		old_pages = [page for page in pages if (proxy_time - page.get('rev') > timedelta.total_seconds())] 
+		old_pages = []
+		if type(timedelta) is datetime.timedelta:
+			old_pages = [page for page in pages if proxy_time - page.get('rev') > timedelta.total_seconds()]
+		elif type(timedelta) is datetime.datetime:
+			old_pages = [page for page in pages if page.get('rev') < timedelta.timestamp()]
 		return old_pages