gistfile1.txt

class PlaylistParser:
    _strategy = {"audio/x-scpls": PlaylistParserPLS(),
                 "application/pls+xml": PlaylistParserPLS(),
                 "audio/mpegurl": PlaylistParserM3U(),
                 "audio/x-mpegurl": PlaylistParserM3U(),
                 "application/xspf+xml": PlaylistParserXSPF()
                 }

    def parse(self, mime, data):
        self.data = data
        return self._stragegy[mime].parse()