run_music.py

import click


@click.group()
def play_music():
    pass

@play_music.command()
def hello():
    click.echo('Here is our nokia composer! It accepts files containing music notes encoded in the microbit.music format.')


@play_music.command()
@click.argument('filename')
def print_song_file(filename):
    "Open a text file containing notes in the microbit format and print it back to the command line."
    with open(filename) as f:
        s = f.read()
    for i in s.split():
        print(i)


@play_music.command()
@click.argument('filename')
def open_song_file(filename):
    "Open a text file containing notes in the microbit format."
    with open(filename) as f:
        s = f.read()
    return s


if __name__ == '__main__':
    play_music()