missing_self

    def get_files_id(self):
        base = sqlite3.connect('base.db')
        cursor = base.cursor()
        files_id = cursor.execute('select file_id from files_id where id=?', (self.id,)).fetchall()
        for i, file_id in enumerate(files_id):
            files_id[i] = file_id[0]
        self.files_id = files_id
        base.close()