+ # <insert time> -> h((key, value))
+ self.itime = db.DB()
+ self.itime.set_flags(db.DB_DUP)
+ self.itime.open(None, None, db.DB_BTREE)
+
+ # key -> h((key, value))
+ self.kw = db.DB()
+ self.kw.set_flags(db.DB_DUP)
+ self.kw.open(None, None, db.DB_BTREE)
+