Create a playlist from all your saved Spotify albums, so you can shuffle your entire library

spotify-saved-albums.py

#!/usr/bin/env python
import spotipy
from spotipy.oauth2 import SpotifyOAuth

# INSTRUCTIONS: 
# Go to https://developer.spotify.com/dashboard, create an app,
# and paste the Client ID and Client Secret below.
# Also make sure to add a random localhost callback URL to 'redirect URLs' in the dashboard, e.g., "http://localhost:8888/callback" as used below. 
sp = spotipy.Spotify(
    auth_manager=SpotifyOAuth(
        client_id="CLIENT_ID_HERE",
        client_secret="CLIENT_SECRET_HERE",
        redirect_uri="http://localhost:8888/callback",
        scope="user-library-read playlist-modify-private",
    )
)
user_id = sp.current_user()["id"]

all_saved_tracks = []

offset = 0
while True:
    offset += 50
    results = sp.current_user_saved_albums(offset=offset, limit=50)
    if results["items"] == []:
        break
    for idx, item in enumerate(results["items"]):
        album = item["album"]
        for track in album["tracks"]["items"]:
            all_saved_tracks.append(track)
        print(idx, album["artists"][0]["name"], " – ", album["name"])

all_saved_track_ids = []
for track in all_saved_tracks:
    all_saved_track_ids.append(track["id"])

# Create the playlist
playlist = sp.user_playlist_create(
    user=user_id,
    name="All songs " + datetime.datetime.now().strftime("%Y-%m-%d"),
    public=False,
)

# Add the songs in chunks of 100, because Spotify is angry when you try to add too many at once
for i in range(0, len(all_saved_track_ids), 100):
    print("Adding songs", i, "to", i + 100)
    sp.playlist_add_items(playlist["id"], all_saved_track_ids[i : i + 100])

print("done")