Fixed id recognize

[albertopasqualetto]

Probably api is changed

[stephanebruckert]

Please provide more details, I don't understand your change and I am not aware of any API changes. Please also try to run lint and unit tests locally as this is currently failing. Check https://github.com/plamere/spotipy/blob/master/CONTRIBUTING.md

[albertopasqualetto]

Well, I fixed flake8 errors.
Anyway I get more failures (9) with no changes than with my change (7); the error I get is this:

Because playlist_id is a dictionary in this case, so the actual id needs to be extracted from the dict.

[albertopasqualetto]

I see that you are deprecating the 'playlist_add_items` using IDs with #919 , so maybe this PR could be closed, since this error appears in this case.

But if nothing has changed, this was not working since my PR (try testing the playlist_add_items(id)) and this would be until v3 #914 .

This is my code

[stephanebruckert]

Ok I'm going to close it.

In your code just make sure you work with track URIs rather than track IDs.