[GH-ISSUE #748] Error with "position" parameter in adding songs to a playlist. #453

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opened 2026-02-27 23:22:42 +03:00 by kerem · 2 comments

kerem commented

2026-02-27 23:22:42 +03:00

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Originally created by @guilevieiram on GitHub (Nov 26, 2021).
Original GitHub issue: https://github.com/spotipy-dev/spotipy/issues/748

Hi, i'm having a problem with my application that started occurring a week or so ago.

While trying to add items to a playlist via the api I get the following error message:

HTTP Error for POST to https://api.spotify.com/v1/playlists/2nshq9eTZLRlGH79r2rsRa/tracks with
 Params: {'position': None} returned 400 due to Error parsing JSON.
http status: 400, code:-1 - https://api.spotify.com/v1/playlists/2nshq9eTZLRlGH79r2rsRa/tracks
:
 Error parsing JSON., reason: None

It had worked wonders in the past but right now i am having this error. I'm using vscode, with a python venv in windows. I had it deployed in Heroku as well and it worked very well there as well.

Here is the specific functions causing issues:

def create_playlist(self, song_list: list[str], date: str) -> [str, str]:
        """Creates a playlist given a list of songs. Returns the uri for that playlist."""
        songs_uri: list[str] = [self._get_song_link(song_name=song) for song in song_list]
        playlist_data: dict = self.man.user_playlist_create(user=self.man.me()["id"], name=f"The Best Of   {date}")
        self.man.playlist_add_items(
            playlist_id=playlist_data["id"],
            items=songs_uri
        )
        print(playlist_data)
        return playlist_data["uri"], playlist_data["external_urls"]["spotify"]

And some helper functions / definitions:

    def __init__(self) -> None:
        """Initializes the spotify API authorization with the given client keys."""
        self.man = spotify = spotipy.Spotify(
            auth_manager=SpotifyOAuth(
                scope="playlist-modify-public",
                redirect_uri="https://guile.ga",
                client_id=os.environ["SPOTIPY_CLIENT_ID"],
                client_secret=os.environ["SPOTIPY_CLIENT_SECRET"],
                show_dialog=True,
                cache_path="token.txt"
            ),
        )

    def _get_song_link(self, song_name: str) -> str:
        """Returns a song link(uri) given a song name."""
        response: dict = self.man.search(q=song_name, limit=1, type="track")
        try:
            song_uri: str = response["tracks"]["items"][0]["uri"]
        except IndexError:
            song_uri: str = "spotify:track:4cOdK2wGLETKBW3PvgPWqT" # this returns "never gonna give you up as exception"
        return song_uri

Here is the link to the full project if you are interest or need to get more information.
Thanks a lot for the help!

Originally created by @guilevieiram on GitHub (Nov 26, 2021). Original GitHub issue: https://github.com/spotipy-dev/spotipy/issues/748 Hi, i'm having a problem with my application that started occurring a week or so ago. While trying to add items to a playlist via the api I get the following error message: ``` HTTP Error for POST to https://api.spotify.com/v1/playlists/2nshq9eTZLRlGH79r2rsRa/tracks with Params: {'position': None} returned 400 due to Error parsing JSON. http status: 400, code:-1 - https://api.spotify.com/v1/playlists/2nshq9eTZLRlGH79r2rsRa/tracks : Error parsing JSON., reason: None ``` It had worked wonders in the past but right now i am having this error. I'm using vscode, with a python venv in windows. I had it deployed in Heroku as well and it worked very well there as well. Here is the specific functions causing issues: ``` def create_playlist(self, song_list: list[str], date: str) -> [str, str]: """Creates a playlist given a list of songs. Returns the uri for that playlist.""" songs_uri: list[str] = [self._get_song_link(song_name=song) for song in song_list] playlist_data: dict = self.man.user_playlist_create(user=self.man.me()["id"], name=f"The Best Of {date}") self.man.playlist_add_items( playlist_id=playlist_data["id"], items=songs_uri ) print(playlist_data) return playlist_data["uri"], playlist_data["external_urls"]["spotify"] ``` And some helper functions / definitions: ``` def __init__(self) -> None: """Initializes the spotify API authorization with the given client keys.""" self.man = spotify = spotipy.Spotify( auth_manager=SpotifyOAuth( scope="playlist-modify-public", redirect_uri="https://guile.ga", client_id=os.environ["SPOTIPY_CLIENT_ID"], client_secret=os.environ["SPOTIPY_CLIENT_SECRET"], show_dialog=True, cache_path="token.txt" ), ) def _get_song_link(self, song_name: str) -> str: """Returns a song link(uri) given a song name.""" response: dict = self.man.search(q=song_name, limit=1, type="track") try: song_uri: str = response["tracks"]["items"][0]["uri"] except IndexError: song_uri: str = "spotify:track:4cOdK2wGLETKBW3PvgPWqT" # this returns "never gonna give you up as exception" return song_uri ``` Here is the link to the full project if you are interest or need to get more information. Thanks a lot for the help!

kerem

2026-02-27 23:22:42 +03:00

closed this issue
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kerem commented

2026-02-27 23:22:43 +03:00

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@stephanebruckert commented on GitHub (Nov 27, 2021):

I think it would help if you share a minimal, reproducible example. Like just 10 lines that show the problem on a fresh playlist.

@stephanebruckert commented on GitHub (Nov 27, 2021): I think it would help if you share a minimal, reproducible example. Like just 10 lines that show the problem on a fresh playlist.

kerem commented

2026-02-27 23:22:43 +03:00

Author

Owner

@guilevieiram commented on GitHub (Nov 27, 2021):

In writing the example i realised that the bug was in another model of my application. Managed to fix it already
Thank you so much!!

@guilevieiram commented on GitHub (Nov 27, 2021): In writing the example i realised that the bug was in another model of my application. Managed to fix it already Thank you so much!!

kerem referenced this issue

2026-02-28 00:02:30 +03:00

[PR #453] [MERGED] add_to_queue endpoint added #901