How to use the mirdata.utils.cached_property function in mirdata

    @utils.cached_property
    def pitch(self):
        """F0Data: The human-annotated pitch"""
        return load_pitch(self.pitch_path)

    @utils.cached_property
    def beats(self):
        """BeatData: the track's beat positions"""
        return load_beats(self.jams_path)

    @utils.cached_property
    def notes(self):
        """dict: a dict that contains 6 NoteData.
            From Low E string to high e string.
            {
                'E': NoteData(...),
                'A': NoteData(...),
                ...
                'e': NoteData(...)
            }
        """
        notes = {}
        # iterate over 6 strings
        for i in range(6):
            notes[_GUITAR_STRINGS[i]] = _load_note_ann(self.jams_path, i)
        return notes

    @utils.cached_property
    def lyrics(self):
        """LyricData: The human-annotated lyrics"""
        return load_lyrics(self.lyrics_path)

    @utils.cached_property
    def melody2(self):
        """F0Data: The pitch of the predominant source for each point in time"""
        return load_melody(self.melody2_path)

    @utils.cached_property
    def beats(self):
        """BeatData: human-labeled beat data"""
        return load_beats(self.beats_path)

    @utils.cached_property
    def notes(self):
        """NoteData: annotated piano notes"""
        return load_notes(self.midi_path, self.midi)

    @utils.cached_property
    def key(self):
        """KeyData: key annotation"""
        return load_key(self.keys_path)

    @utils.cached_property
    def sections_annotator_2_uppercase(self):
        """SectionData: annotations in hierarchy level 0 from annotator 2"""
        if self.sections_annotator2_uppercase_path is None:
            return None
        return load_sections(self.sections_annotator2_uppercase_path)

    @utils.cached_property
    def sections(self):
        """SectionData: section annotation"""
        return load_sections(self.sections_path)