Recommendations seeds parameters formatted as a comma seperated list to comply with Spotify API. Fixes problem of only first seed_artist/track/genre being used to generate recommendations.
Recommendations seeds parameters formatted as a comma seperated list to
comply with Spotify API. Fixes problem of only first
seed_artist/track/genre being used to generate recommendations.

Mltiple params in the form of "seed_artist=xxxx&seed_artists=yyyy"
results in Spotify API ignoring everything but the first parameter.

plamere/spotipy