Playing mp3 from variable

[wavic]

That is not how you pass a  variable value to a system command. mpg123 is looking for file with name play_sound while the song has a name 'song1.mp3' for example.

os.system('mpg123 -q {}'.format(play_sound))

should work. I use mplayer or mpv

subprocess module offers more powerful tools to run system commands.