Spotipy

Added

- Added `MemoryCacheHandler`, a cache handler that simply stores the token info in memory as an instance attribute of this class.
- If a network request returns an error status code but the response body cannot be decoded into JSON, then fall back on decoding the body into a string.
- Added `DjangoSessionCacheHandler`, a cache handler that stores the token in the session framework provided by Django. Web apps using spotipy with Django can directly use this for cache handling.

Fixed

- Fixed a bug in `CacheFileHandler.__init__`: The documentation says that the username will be retrieved from the environment, but it wasn't.
- Fixed a bug in the initializers for the auth managers that produced a spurious warning message if you provide a cache handler, and you set a value for the "SPOTIPY_CLIENT_USERNAME" environment variable.
- Use generated MIT license and fix license type in `pip show`

Added

- Enabled using both short and long IDs for playlist_change_details
- Added a cache handler to `SpotifyClientCredentials`
- Added the following endpoints
- `Spotify.current_user_saved_episodes`
- `Spotify.current_user_saved_episodes_add`
- `Spotify.current_user_saved_episodes_delete`
- `Spotify.current_user_saved_episodes_contains`
- `Spotify.available_markets`

Changed

- Add support for a list of scopes rather than just a comma separated string of scopes

Fixed

- Fixed the bugs in `SpotifyOAuth.refresh_access_token` and `SpotifyPKCE.refresh_access_token` which raised the incorrect exception upon receiving an error response from the server. This addresses 645.
- Fixed a bug in `RequestHandler.do_GET` in which the non-existent `state` attribute of `SpotifyOauthError` is accessed. This bug occurs when the user clicks "cancel" in the permissions dialog that opens in the browser.
- Cleaned up the documentation for `SpotifyClientCredentials.__init__`, `SpotifyOAuth.__init__`, and `SpotifyPKCE.__init__`.

Fixed

- `allowed_methods` requires urllib3>=1.26.0

Changed

- moved os.remove(session_cache_path()) inside try block to avoid TypeError on app.py example file
- A warning will no longer be emitted when the cache file does not exist at the specified path
- The docs for the `auth` parameter of `Spotify.init` use the term "access token" instead of "authorization token"
- Changed docs for `search` to mention that you can provide multiple types to search for
- The query parameters of requests are now logged
- Deprecate specifying `cache_path` or `username` directly to `SpotifyOAuth`, `SpotifyPKCE`, and `SpotifyImplicitGrant` constructors, instead directing users to use the `CacheFileHandler` cache handler
- Removed requirement for examples/app.py to specify port multiple times (only SPOTIPY_REDIRECT_URI needs to contain the port)

Added

- Added log messages for when the access and refresh tokens are retrieved and when they are refreshed
- Support `market` optional parameter in `track`
- Added CacheHandler abstraction to allow users to cache tokens in any way they see fit

Fixed

- Fixed Spotify.user_playlist_reorder_tracks calling Spotify.playlist_reorder_tracks with an incorrect parameter order
- Fixed deprecated Urllib3 `Retry(method_whitelist=...)` in favor of `Retry(allowed_methods=...)`

Fixed

- playlist_tracks example code no longer prints extra characters on final loop iteration
- SpotifyException now thrown when a request fails & has no response ([571](https://github.com/plamere/spotipy/issues/571), [#581](https://github.com/plamere/spotipy/issues/581))
- Added scope, `playlist-read-private`, to examples that access user playlists using the spotipy api: current_user_playlists() ([591](https://github.com/plamere/spotipy/issues/591))
- Enable retries for POST, DELETE, PUT ([577](https://github.com/plamere/spotipy/issues/577))

Changed

- both inline and starting import lists are sorted using `isort` module
- changed Max Retries exception code from 599 to 429

Added

- `open_browser` can be passed to the constructors of `SpotifyOAuth` and `SpotifyPKCE` to make it easier to authorize in browserless environments