如何用树莓派pico播放《玛丽有只小羊羔》？

from machine import Pin, PWMimport utime# 定义音调频率tones = {1: 262, 2: 294, 3: 330, 4: 349, 5: 392, 6: 440, 7: 494, -: 0}# 定义小星星旋律melody = "1155665-4433221-5544332-5544332-1155665-44…

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