ms.py

import os
import shutil

# Prefer system-installed MuseScore
if shutil.which("musescore3"):
    MSCORE = "musescore3"
elif shutil.which("mscore"):
    MSCORE = "mscore"
else:
    raise RuntimeError("MuseScore executable not found")

os.environ["QT_QPA_PLATFORM"] = "offscreen"