# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from six import text_type

from ...property import Configurable


class SubtitleFormat(Configurable):
    """Subtitle Format property."""

    @classmethod
    def _extract_key(cls, value):
        key = text_type(value)  .upper()
        if key.startswith('S_'):
            key = key[2:]

        return key.split('/')[-1]