使用带有partitionByInstrument()的music21读取MIDI文件，以获取返回空列表的音符和和弦

pip install music21

from music21 import converter

# 读取MIDI文件
midi_file = 'path_to_midi_file.mid'
score = converter.parse(midi_file)

# 使用partitionByInstrument()分组
instrument_groups = score.partitionByInstrument()

# 遍历乐器组
for instrument_group in instrument_groups:
    # 获取乐器名称
    instrument_name = instrument_group.getInstrument().instrumentName

    # 获取音符和和弦
    notes = []
    chords = []
    for element in instrument_group:
        if 'Note' in element.classes:
            notes.append(element)
        elif 'Chord' in element.classes:
            chords.append(element)

    # 打印结果
    print(f'乐器名称：{instrument_name}')
    print(f'音符列表：{notes}')
    print(f'和弦列表：{chords}')
    print('----------------')