Adding tracks to a playlist in Spotify using Spotipy

Question

I'm using the Python bindings for the Spotify API to list an artists top tracks and add them to a playlist, but it fails every time, as if it excepts a different type of input.

New_Track_List is a string containing the output of the top tracks lookup as either:

1: URIs:

Example: "spotify:track:1pAyyxlkPuGnENdj4g7Y4f, spotify:track:7D2xaUXQ4DGY5JJAdM5mGP, spotify:track:74mG2xIxEUJwHckS0Co6jF, spotify:track:2rjqDPbLlbQRlcj8DVM9kn,"

Using URIs I get this back from the function

sp.user_playlist_add_tracks(username, playlist_id=playlist, tracks=New_Track_List)

Traceback:

spotipy.client.SpotifyException: http status: 400, code:-1 - https://api.spotify.com/v1/users/smokieprofile/playlists/40aijTeKoxo5u1VSS9E3UQ/tracks: You can add a maximum of 100 tracks per request.

There's only 20 tracks in the string.

2nd try: Track IDs:

Example: "1pAyyxlkPuGnENdj4g7Y4f, 7D2xaUXQ4DGY5JJAdM5mGP, 74mG2xIxEUJwHckS0Co6jF, 2rjqDPbLlbQRlcj8DVM9kn"

Same traceback output.

Using a single track ID

sp.user_playlist_add_tracks(username, playlist_id=playlist, tracks="spotify:track:74mG2xIxEUJwHckS0Co6jF")

Trying to add just ONE track, gets me this message:

spotipy.client.SpotifyException: http status: 400, code:-1 - https://api.spotify.com/v1/users/smokieprofile/playlists/40aijTeKoxo5u1VSS9E3UQ/tracks: Invalid track uri: spotify:track:s

Same message using only the Track ID, as if it only checks the first letter of the passed string.

    sp.user_playlist_add_tracks(username, playlist_id=playlist, tracks="7D2xaUXQ4DGY5JJAdM5mGP")

Error traceback:

spotipy.client.SpotifyException: http status: 400, code:-1 - https://api.spotify.com/v1/users/smokieprofile/playlists/40aijTeKoxo5u1VSS9E3UQ/tracks: Invalid track uri: spotify:track:7

Answer 1

This looks like a problem with duck typing in python and bad error message in the api. I guess that the api requires you to send a list and not a string, but doesn't actually check that. The problem is that a string is also iterable.

>>> tracks = "spotify:track:1pAyyxlkPuGnENdj4g7Y4f, spotify:track:7D2xaUXQ4DGY5JJAdM5mGP, spotify:track:74mG2xIxEUJwHckS0Co6jF, spotify:track:2rjqDPbLlbQRlcj8DVM9kn"
>>> len(tracks)
150

and that the api takes actually a list of track ids (not a string of comma separated track uris) and prepends 'spotify:track:' infront of all ids:

>>> tracks = "spotify:track:74mG2xIxEUJwHckS0Co6jF"
>>> ["spotify:track:" + track for track in tracks][0]
'spotify:track:s'

Thus, if you instead give the api a list of track Ids, it might work:

>>> tracks = ["1pAyyxlkPuGnENdj4g7Y4f", "7D2xaUXQ4DGY5JJAdM5mGP"]
>>> ["spotify:track:" + track for track in tracks][0]
'spotify:track:1pAyyxlkPuGnENdj4g7Y4f'