unitdata.py 文件源码

def unset(self, key):
        """
        Remove a key from the database entirely.
        """
        self.cursor.execute('delete from kv where key=?', [key])
        if self.revision and self.cursor.rowcount:
            self.cursor.execute(
                'insert into kv_revisions values (?, ?, ?)',
                [key, self.revision, json.dumps('DELETED')])