A script to upload music to Google Play Music

gmusicupload.py

#!/usr/bin/env python3
from gmusicapi import Musicmanager # pip install gmusicapi
from glob import glob
from argparse import ArgumentParser
from sys import stderr
from urllib.parse import quote_plus

m = Musicmanager()
if not m.login():
    m.perform_oauth()
    m.login()

def upload(path):
    uploaded,matched,not_uploaded = m.upload(path)
    completed_ids = set()
    for fn,_id in uploaded.items():
        completed_ids.add(_id)
    for fn,_id in matched.items():
        completed_ids.add(_id)
    for fn,_id in not_uploaded.items():
        print("{} not uploaded: {}".format(fn,_id), file=stderr)
    return completed_ids

def main():
    parser = ArgumentParser()
    parser.add_argument("files", nargs="+", help="Files to upload")
    args = parser.parse_args()
    completed_ids = set()
    for file in args.files:
        if '*' in file:
            for subfile in glob(file):
                completed_ids.update(upload(subfile))
        else:
            completed_ids.update(upload(file))
    all_songs = {song["id"]:song for song in m.get_uploaded_songs() if song["id"] in completed_ids}
    albums = set()
    for _id in completed_ids:
        if _id[0] == "T": # gmusic track
            print("https://play.google.com/music/m/{}".format(_id))
        else:
            albums.add("https://play.google.com/music/listen#/album///" + quote_plus(all_songs[_id]["album"]))
    print("\n".join(albums))

if __name__ == "__main__":
    main()

Will this script add another device to the device list?

This uses the Musicmanager api, it's the same api as used by the Play Music desktop application. It doesn't add to the device list.