hello_pyxel.py

import pyxel
      
class App:
   def __init__(self):
      pyxel.init(160, 120, title="hello")
      pyxel.run(self.update, self.draw)
   
   def update(self):
      pass

   def draw(self):
      pyxel.cls(0)

if __name__ == "__main__":
   App()

import pyxel
      
def sound_set():
   pyxel.sound(0).set(
      "C2D2E2R",
      "t",
      "7",
      "n",
      60,
   )

class App:
   def __init__(self):
      pyxel.init(160, 120, title="music")

      sound_set()
      pyxel.play(0, 0)
      pyxel.run(self.update, self.draw)
   
   def update(self):
      if pyxel.play_pos(0) is None:
         pyxel.quit()

   def draw(self):
      pyxel.cls(0)

if __name__ == "__main__":
   App()