大家好，我是宁一。
最近我的私人教练总是被黑。
人家厚积薄发，一周直播五次，实打实的带着大家锻炼，这都可以挑刺。
作为刘畊宏女孩，咱必须要支棱起来！！
也没啥其他技能，就用Python写首《本草纲目》给刘教练应援一下吧！
没错，Python不仅可以做数据分析，还可以用来写歌。
绝绝子！
用的是Python的mido库，先来测试几个音。
#导入mido库
from mido import Message, MidiFile, MidiTrack
#创建.mid文件
mid = MidiFile()
#创建一个音轨
track = MidiTrack()
#设置音色，1表示明亮的钢琴
track.append(Message('program_change',program=1, time=0))
#播放C4
track.append(Message('note_on', note=60,velocity=64, time=480))
track.append(Message('note_off', note=60,velocity=127, time=480))
#播放D4
track.append(Message('note_on', note=62,velocity=64, time=480))
track.append(Message('note_off', note=62,velocity=127, time=480))
midi_file="test.mid"
#保存.mid文件
mid.save(midi_file)
运行后生成mid文件，Mac电脑可以用库乐队播放，Windows电脑可以用MidiEditor播放。
测试没问题，咱们正式开始写歌~
第一步：
找到《本草纲目》简谱
第二步：
简谱翻译成mido库能看懂的数据
def play_note(note, length, track, base_num=1, delay=0, velocity=1.0, channel=0):
meta_time = 60 * 60 * 10 / bpm
major_notes = [0, 2, 2, 1, 2, 2, 2, 1]
base_note = 60
track.append(Message("program_change", program=2, time=0))
track.append(
Message('note_on', note=base_note + base_num * 12 + sum(major_notes[0:note]), velocity=round(64 * velocity),
time=round(delay * meta_time), channel=channel))
track.append(
Message('note_off', note=base_note + base_num * 12 + sum(major_notes[0:note]), velocity=round(64 * velocity),
time=round(meta_time * length), channel=channel))
第三步：
创建音轨，生成mid文件
fileName = "bcgm.mid"
mid = MidiFile() # 创建midi文件
pg.mixer.init()
# 创建音轨
track1 = play_note(2,mids1,0)
track2 = play_note(44,mids2,4)
mid.tracks.append(track1)
mid.tracks.append(track2)
mid.save(fileName)
最后播放音乐，听听最终效果吧~
用Python写首《本草纲目》
完整代码：
# 本草纲目
from mido import Message, MidiFile, MidiTrack
import pygame as pg
'''
播放一个音符
note 简谱的音符,21到108，以半音作为最小单位
length 音符长度
Program 确定乐器 2钢琴
velocity 音量
time 间隔时间
'''
def play_note(program,mids,channel):
track = MidiTrack()
track.append(Message("program_change", program=program, time=0))
for arrs in mids:
if arrs[0] == 0:
track.append(Message('note_on', note=arrs[1], velocity=arrs[2], time=arrs[3], channel=channel))
else:
track.append(Message('note_off', note=arrs[1], velocity=arrs[2], time=arrs[3], channel=channel))
return track
# 定义音符 arr[0] 0代表note_on，1代表note_off arr[1]=note arr[2]=velocity arr[3]=time
mids1 = [[0, 75, 80, 48], [1, 75, 64, 216], [0, 70, 80, 24], [1, 70, 64, 108],
[0, 73, 80, 12], [1, 73, 64, 108], [0, 75, 80, 12], [1, 75, 64, 216], [0, 75, 80, 24],
[1, 75, 64, 216], [0, 70, 80, 24], [1, 70, 64, 108], [0, 73, 80, 12], [1, 73, 64, 108],
[0, 75, 80, 12], [1, 75, 64, 216], [0, 75, 80, 24], [1, 75, 64, 432], [0, 75, 80, 48],
[1, 75, 64, 216], [0, 70, 80, 24], [1, 70, 64, 108], [0, 73, 80, 12], [1, 73, 64, 108],
[0, 75, 80, 12], [1, 75, 64, 216], [0, 75, 80, 24], [1, 75, 64, 216], [0, 70, 80, 24],
[1, 70, 64, 108], [0, 73, 80, 12], [1, 73, 64, 108], [0, 70, 80, 12], [1, 70, 64, 216],
[0, 63, 80, 24], [1, 63, 64, 432], [0, 75, 80, 48], [1, 75, 64, 216], [0, 70, 80, 24],
[1, 70, 64, 108], [0, 73, 80, 12], [1, 73, 64, 108], [0, 75, 80, 12], [1, 75, 64, 216],
[0, 75, 80, 24], [1, 75, 64, 216], [0, 70, 80, 24], [1, 70, 64, 108], [0, 73, 80, 12],
[1, 73, 64, 108], [0, 75, 80, 12], [1, 75, 64, 216], [0, 75, 80, 24], [1, 75, 64, 432],
[0, 75, 80, 48], [1, 75, 64, 216], [0, 70, 80, 24], [1, 70, 64, 108], [0, 73, 80, 12],
[1, 73, 64, 108], [0, 75, 80, 12], [1, 75, 64, 216], [0, 75, 80, 24], [1, 75, 64, 216],
[0, 70, 80, 24], [1, 70, 64, 108], [0, 73, 80, 12], [1, 73, 64, 108], [0, 75, 80, 12],
[1, 75, 64, 216], [0, 75, 80, 24], [1, 75, 64, 432], [0, 76, 80, 0], [1, 76, 64, 216],
[0, 71, 80, 24], [1, 71, 64, 108], [0, 74, 80, 12], [1, 74, 64, 108], [0, 76, 80, 12],
[1, 76, 64, 216], [0, 76, 80, 24], [1, 76, 64, 216], [0, 71, 80, 24], [1, 71, 64, 108],
[0, 74, 80, 12], [1, 74, 64, 108], [0, 76, 80, 12], [1, 76, 64, 216], [0, 76, 80, 24],
[1, 76, 64, 432], [0, 76, 80, 48], [1, 76, 64, 216], [0, 71, 80, 24], [1, 71, 64, 108],
[0, 74, 80, 12], [1, 74, 64, 108], [0, 76, 80, 12], [1, 76, 64, 216], [0, 76, 80, 24],
[1, 76, 64, 216], [0, 71, 80, 24], [1, 71, 64, 108], [0, 74, 80, 12], [1, 74, 64, 108],
[0, 71, 80, 12], [1, 71, 64, 216], [0, 64, 80, 24], [1, 64, 64, 432], [0, 76, 80, 48],
[1, 76, 64, 216], [0, 71, 80, 24], [1, 71, 64, 108], [0, 74, 80, 12], [1, 74, 64, 108],
[0, 76, 80, 12], [1, 76, 64, 216], [0, 76, 80, 24], [1, 76, 64, 216], [0, 71, 80, 24],
[1, 71, 64, 108], [0, 74, 80, 12], [1, 74, 64, 108], [0, 76, 80, 12], [1, 76, 64, 216],
[0, 76, 80, 24], [1, 76, 64, 432], [0, 76, 80, 48], [1, 76, 64, 216], [0, 71, 80, 24],
[1, 71, 64, 108], [0, 74, 80, 12], [1, 74, 64, 108], [0, 76, 80, 12], [1, 76, 64, 216],
[0, 76, 80, 24], [1, 76, 64, 216], [0, 71, 80, 24], [1, 71, 64, 108], [0, 74, 80, 12],
[1, 74, 64, 108], [0, 76, 80, 12], [1, 76, 64, 216], [0, 76, 80, 24], [1, 76, 64, 432]]
mids2 = [[0, 37, 80, 0], [1, 37, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108], [0, 39, 80, 612],
[1, 39, 64, 108], [0, 37, 80, 852], [1, 37, 64, 108], [0, 39, 80, 12], [1, 39, 64, 216],
[0, 39, 80, 624], [1, 39, 64, 108], [0, 39, 80, 132], [1, 39, 64, 216], [0, 39, 80, 24],
[1, 39, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108],
[0, 37, 80, 252], [1, 37, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108], [0, 39, 80, 612],
[1, 39, 64, 108], [0, 37, 80, 852], [1, 37, 64, 108], [0, 39, 80, 12], [1, 39, 64, 216],
[0, 39, 80, 624], [1, 39, 64, 108], [0, 39, 80, 132], [1, 39, 64, 216], [0, 39, 80, 24],
[1, 39, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108],
[0, 37, 80, 732], [1, 37, 64, 108],[0, 37, 80, 0], [1, 37, 64, 108], [0, 39, 80, 12],
[1, 39, 64, 108], [0, 39, 80, 612],[1, 39, 64, 108], [0, 37, 80, 852], [1, 37, 64, 108],
[0, 39, 80, 12], [1, 39, 64, 216],[0, 39, 80, 624], [1, 39, 64, 108], [0, 39, 80, 132],
[1, 39, 64, 216], [0, 39, 80, 24], [1, 39, 64, 108], [0, 39, 80, 12], [1, 39, 64, 108],
[0, 39, 80, 12], [1, 39, 64, 108],[0, 37, 80, 252], [1, 37, 64, 108], [0, 39, 80, 12],
[1, 39, 64, 108], [0, 39, 80, 612],[1, 39, 64, 108], [0, 37, 80, 852], [1, 37, 64, 108],
[0, 39, 80, 12], [1, 39, 64, 216]]
# 播放MIDI
def play_music(music_file):
clock = pg.time.Clock()
pg.mixer.music.load(music_file)
pg.mixer.music.play()
while pg.mixer.music.get_busy():
clock.tick(30)
# 主程序
fileName = "bcgm.mid"
mid = MidiFile() # 创建midi文件
pg.mixer.init()
# 创建音轨
track1 = play_note(2,mids1,0)
track2 = play_note(44,mids2,4)
mid.tracks.append(track1)
mid.tracks.append(track2)
# 保存mid文件
mid.save(fileName)
play_music(fileName)
复制粘贴代码保存到Python文件中，运行Python文件，就能听到歌声啦~
