code: def save_card(self, card, cache=False):
          
          if cache:
              self.cache_card(card)
          carddict = card.save()
          with sqlite3.connect(self.dbname) as carddb:
              carddb.execute("DELETE from CARDS where code = ?",
                             (carddict["code"],))
              carddb.execute("INSERT INTO CARDS VALUES(?, ?, ?, ?, ?)",
                             [carddict[key] if isinstance(carddict[key], str)
                              else str(carddict[key]) for key in FIELDS])
docs: Save the given card to the database. This calls each save event hook
          on the save string before commiting it to the database.