Hidden limits for current_user_saved_* endpoints

[rv3392]

Describe the bug
When doing a request to some (potentially all, but I haven't tested) of the current_user_saved_* endpoints such as current_user_saved_shows_add and current_user_saved_shows_delete there is a hidden limit (of 50) to the number of IDs that can be passed in. This is a restriction on Spotify's end, but isn't really documented anywhere in the library. I think simply documenting this should be enough to avoid any errors, it should just be clear that passing more than 50 items to these endpoints will cause an error.

Your code
Code that doesn't work (passing 51 items to the current_user_saved_shows_add function):

import spotipy
from spotipy import SpotifyOAuth

shows = ['2PQxEHzQFao28CkFsAeKKF', '5qs7Q9vuPqPPwPF4TowBzw', '362DwZBa01YuXx5LeK8Psp', '5Flyniqb8z6tg3ih7KQpWw', '06bz0CgppKdIUlZ7HcckZI', '05IaQthMEh8NSqpbfaO12y', '64nFJEu758qByG5l6kqg6F', '2zS4NZ0ifzivJGmtaMqJwv', '0vYTIMav7el5VXq5n5pxhI', '1Tgsr2BDHLSQ44YsOwoguj', '2hmkzUtix0qTqvtpPcMzEL', '6qvMMubhD8HnFaHrUrbj0Z', '1cBhYjm2fildfRsNDEYLcm', '7y2q3VMC6WLsMlFXT3TyO7', '1cebrSa4kuOOaULNOza4RO', '44DE64rRpX1cFIQUlqQtvi', '2vdrao20EwrhpLeO59ZT7K', '22OJWsluntwDB1siMFIA9V', '3BHScKAhtaSxo6LZl9g8kk', '0C4V1DxK6v3s1TEj4hgpia', '2cKdcxETn7jDp7uJCwqmSE', '2Shpxw7dPoxRJCdfFXTWLE', '7Fwh0RaRTTFqKuqwX9m7BM', '05gf7mODpGt1y8dTwbYbZo', '59I1XnvAB9fQzSj9SIKCoI', '5ykZ7DGfxkdhuCvn3jwP3X', '6Ijz5uEUxN6FvJI49ZGJAJ', '7GeAE3ILNdnk9ZS7TfKjfj', '1XeleYXleZeyGRpmoG2Nzw', '34DG4iX044aFGNPGb4hkqY', '3YFFg0qI464m9Zg0CG8HlL', '7rtPDwn7svKg9ov6ALqsSl', '1XSjN7lgDlwMzHy43gMANd', '2dXkTgfC5mECruaLFUERe1', '5M2eCjpUwWQi43iqVaIHR7', '2dY2l2v95zz9HTlYvDSAdA', '0S1h5K7jm2YvOcM7y1ZMXY', '0W4lU1c6SDdVm40Xzv7W2L', '5lY4b5PGOvMuOYOjOVEcb9', '3E5Bn9bOSZeNSwkHZtog5A', '6u8aqT4yaqnXiAwSHQP0NN', '1VXcH8QHkjRcTCEd88U3ti', '585Fazg0GGNMIXnyCt5B56', '36P6Xk2292DapFNerkRbDw', '025ShRPn5glhebeDjXX542', '3scirzcuaGm02MQ4FUZydq', '0Bmh1vg4ZHjc4J9LjQ0J2F', '6qdfc9eJihq4Wj4UglBPIn', '2VRS1IJCTn2Nlkg33ZVfkM', '4V3K3zyD0k789eaSWFXzhc', '2ZTE4GUHZd1QxU4SsYIbsd',]

scope = "user-library-read,user-library-modify"
sp = spotipy.Spotify(auth_manager=SpotifyOAuth(scope=scope,))

num_shows = len(sp.current_user_saved_shows(limit=50)["items"]) # Should be 0
print("Number of shows before adding:", num_shows)
sp.current_user_saved_shows_add(shows)
num_shows = len(sp.current_user_saved_shows(limit=50)["items"]) # Should be 51 but is 0
print("Number of shows after adding:", num_shows)
sp.current_user_saved_shows_delete(shows)

Code that does work (passing 50 items to the current_user_saved_shows_add function):

import spotipy
from spotipy import SpotifyOAuth

shows = ['2PQxEHzQFao28CkFsAeKKF', '5qs7Q9vuPqPPwPF4TowBzw', '362DwZBa01YuXx5LeK8Psp', '5Flyniqb8z6tg3ih7KQpWw', '06bz0CgppKdIUlZ7HcckZI', '05IaQthMEh8NSqpbfaO12y', '64nFJEu758qByG5l6kqg6F', '2zS4NZ0ifzivJGmtaMqJwv', '0vYTIMav7el5VXq5n5pxhI', '1Tgsr2BDHLSQ44YsOwoguj', '2hmkzUtix0qTqvtpPcMzEL', '6qvMMubhD8HnFaHrUrbj0Z', '1cBhYjm2fildfRsNDEYLcm', '7y2q3VMC6WLsMlFXT3TyO7', '1cebrSa4kuOOaULNOza4RO', '44DE64rRpX1cFIQUlqQtvi', '2vdrao20EwrhpLeO59ZT7K', '22OJWsluntwDB1siMFIA9V', '3BHScKAhtaSxo6LZl9g8kk', '0C4V1DxK6v3s1TEj4hgpia', '2cKdcxETn7jDp7uJCwqmSE', '2Shpxw7dPoxRJCdfFXTWLE', '7Fwh0RaRTTFqKuqwX9m7BM', '05gf7mODpGt1y8dTwbYbZo', '59I1XnvAB9fQzSj9SIKCoI', '5ykZ7DGfxkdhuCvn3jwP3X', '6Ijz5uEUxN6FvJI49ZGJAJ', '7GeAE3ILNdnk9ZS7TfKjfj', '1XeleYXleZeyGRpmoG2Nzw', '34DG4iX044aFGNPGb4hkqY', '3YFFg0qI464m9Zg0CG8HlL', '7rtPDwn7svKg9ov6ALqsSl', '1XSjN7lgDlwMzHy43gMANd', '2dXkTgfC5mECruaLFUERe1', '5M2eCjpUwWQi43iqVaIHR7', '2dY2l2v95zz9HTlYvDSAdA', '0S1h5K7jm2YvOcM7y1ZMXY', '0W4lU1c6SDdVm40Xzv7W2L', '5lY4b5PGOvMuOYOjOVEcb9', '3E5Bn9bOSZeNSwkHZtog5A', '6u8aqT4yaqnXiAwSHQP0NN', '1VXcH8QHkjRcTCEd88U3ti', '585Fazg0GGNMIXnyCt5B56', '36P6Xk2292DapFNerkRbDw', '025ShRPn5glhebeDjXX542', '3scirzcuaGm02MQ4FUZydq', '0Bmh1vg4ZHjc4J9LjQ0J2F', '6qdfc9eJihq4Wj4UglBPIn', '2VRS1IJCTn2Nlkg33ZVfkM', '4V3K3zyD0k789eaSWFXzhc', '2ZTE4GUHZd1QxU4SsYIbsd',]

scope = "user-library-read,user-library-modify"
sp = spotipy.Spotify(auth_manager=SpotifyOAuth(scope=scope,))

num_shows = len(sp.current_user_saved_shows(limit=50)["items"]) # Should be 0
print("Number of shows before adding:", num_shows)
sp.current_user_saved_shows_add(shows[0:50])
num_shows = len(sp.current_user_saved_shows(limit=50)["items"]) # This time it works
print("Number of shows after adding:", num_shows)
sp.current_user_saved_shows_delete(shows[0:50])

Output
For the code that doesn't work:

Number of shows before adding: 0
HTTP Error for PUT to https://api.spotify.com/v1/me/shows?ids=2PQxEHzQFao28CkFsAeKKF,5qs7Q9vuPqPPwPF4TowBzw,362DwZBa01YuXx5LeK8Psp,5Flyniqb8z6tg3ih7KQpWw,06bz0CgppKdIUlZ7HcckZI,05IaQthMEh8NSqpbfaO12y,64nFJEu758qByG5l6kqg6F,2zS4NZ0ifzivJGmtaMqJwv,0vYTIMav7el5VXq5n5pxhI,1Tgsr2BDHLSQ44YsOwoguj,2hmkzUtix0qTqvtpPcMzEL,6qvMMubhD8HnFaHrUrbj0Z,1cBhYjm2fildfRsNDEYLcm,7y2q3VMC6WLsMlFXT3TyO7,1cebrSa4kuOOaULNOza4RO,44DE64rRpX1cFIQUlqQtvi,2vdrao20EwrhpLeO59ZT7K,22OJWsluntwDB1siMFIA9V,3BHScKAhtaSxo6LZl9g8kk,0C4V1DxK6v3s1TEj4hgpia,2cKdcxETn7jDp7uJCwqmSE,2Shpxw7dPoxRJCdfFXTWLE,7Fwh0RaRTTFqKuqwX9m7BM,05gf7mODpGt1y8dTwbYbZo,59I1XnvAB9fQzSj9SIKCoI,5ykZ7DGfxkdhuCvn3jwP3X,6Ijz5uEUxN6FvJI49ZGJAJ,7GeAE3ILNdnk9ZS7TfKjfj,1XeleYXleZeyGRpmoG2Nzw,34DG4iX044aFGNPGb4hkqY,3YFFg0qI464m9Zg0CG8HlL,7rtPDwn7svKg9ov6ALqsSl,1XSjN7lgDlwMzHy43gMANd,2dXkTgfC5mECruaLFUERe1,5M2eCjpUwWQi43iqVaIHR7,2dY2l2v95zz9HTlYvDSAdA,0S1h5K7jm2YvOcM7y1ZMXY,0W4lU1c6SDdVm40Xzv7W2L,5lY4b5PGOvMuOYOjOVEcb9,3E5Bn9bOSZeNSwkHZtog5A,6u8aqT4yaqnXiAwSHQP0NN,1VXcH8QHkjRcTCEd88U3ti,585Fazg0GGNMIXnyCt5B56,36P6Xk2292DapFNerkRbDw,025ShRPn5glhebeDjXX542,3scirzcuaGm02MQ4FUZydq,0Bmh1vg4ZHjc4J9LjQ0J2F,6qdfc9eJihq4Wj4UglBPIn,2VRS1IJCTn2Nlkg33ZVfkM,4V3K3zyD0k789eaSWFXzhc,2ZTE4GUHZd1QxU4SsYIbsd with Params: {} returned 400 due to Bad request.

For the code that does work:

Number of shows before adding: 0
Number of shows after adding: 50

Expected behavior
Based on the documentation present, it's expected that the first code example adds 51 shows (contained in the "shows" list). Instead, nothing happens and a cryptic error is thrown. When the first 50 items of the "shows" list is taken using a slice and passed to the endpoint, then it works as expected.

Additional context
I haven't included the full traceback for the case that doesn't work but if that's needed I can do so. When I get some time, I will also try to test some of the other endpoints to get a proper list of which ones don't work.