def matchers(self):
timestamps = Watchlist.timestamps()
for ts in self.watchlists.keys():
if ts not in timestamps:
self.watchlists.pop(ts, None)
for ts in timestamps:
if ts not in self.watchlists:
log.info('Entity tagger updating watchlist: %r', ts)
self.watchlists[ts] = self.compile_watchlist(ts[0])
return self.watchlists.values()
