V3 (#665)

* Added an exception clause that catches `FileNotFoundError` and logs a debug message in `SpotifyOAuth.get_cached_token`, `SpotifyPKCE.get_cached_token` and `SpotifyImplicitGrant.get_cached_token`.

* Changed docs for `auth` parameter of `Spotify.init` to `access token` instead of `authorization token`. In issue #599, a user confused the access token with the authorization code.

* Updated CHANGELOG.md

* Removed `FileNotFoundError` because it does not exist in python 2.7 (*sigh*) and replaced it with a call to `os.path.exists`.

* Replaced ` os.path.exists` with `error.errno == errno.ENOENT` to supress errors when the cache file does not exist.

* Changed docs for `search` to mention that you can provide multiple multiple types to search for. The query parameters of requests are now logged. Added log messages for when the access token and refresh tokens are retrieved and when they are refreshed. Other small grammar fixes.

* Removed duplicate word "multiple" from CHANGELOG

* * 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__`.

* Removed unneeded import

* Added cache handler to `SpotifyClientCredentials` and fixed a bug in refresh tokens methods that raised the wrong exception (#655)

* Added an exception clause that catches `FileNotFoundError` and logs a debug message in `SpotifyOAuth.get_cached_token`, `SpotifyPKCE.get_cached_token` and `SpotifyImplicitGrant.get_cached_token`.

* Changed docs for `auth` parameter of `Spotify.init` to `access token` instead of `authorization token`. In issue #599, a user confused the access token with the authorization code.

* Updated CHANGELOG.md

* Removed `FileNotFoundError` because it does not exist in python 2.7 (*sigh*) and replaced it with a call to `os.path.exists`.

* Replaced ` os.path.exists` with `error.errno == errno.ENOENT` to supress errors when the cache file does not exist.

* Changed docs for `search` to mention that you can provide multiple multiple types to search for. The query parameters of requests are now logged. Added log messages for when the access token and refresh tokens are retrieved and when they are refreshed. Other small grammar fixes.

* Removed duplicate word "multiple" from CHANGELOG

* * 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__`.

* Removed unneeded import

Co-authored-by: Stéphane Bruckert <stephane.bruckert@gmail.com>

* Made `CacheHandler` an abstract base class

Added:

* `Scope` - An enum which contains all of the authorization scopes (see [here](https://github.com/plamere/spotipy/issues/652#issuecomment-797461311)).

* 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

* Fixed formatting issues. Removed python 2.7 from github workflows.

* Added python 3.9 to github workflows. The type hints for set now uses the generic typing.Set instead of builtins.set.

* Changed f-string to percent-formatted string.

* Fixed the duplicate "###Changed" section in the change log.

Co-authored-by: Stéphane Bruckert <stephane.bruckert@gmail.com>

spotipy/__init__.py

@@ -3,3 +3,4 @@ from .client import *  # noqa
 from .exceptions import *  # noqa
 from .oauth2 import *  # noqa
 from .util import *  # noqa
+from .scope import *  # noqa

spotipy/cache_handler.py

@@ -14,33 +14,32 @@ import os
 from spotipy.util import CLIENT_CREDS_ENV_VARS
 
 from redis import RedisError
+from abc import ABC, abstractmethod
 
 logger = logging.getLogger(__name__)
 
 
-class CacheHandler():
+class CacheHandler(ABC):
     """
     An abstraction layer for handling the caching and retrieval of
     authorization tokens.
 
-    Custom extensions of this class must implement get_cached_token
+    Clients are expected to subclass this class and override the
-    and save_token_to_cache methods with the same input and output
+    get_cached_token and save_token_to_cache methods with the same
-    structure as the CacheHandler class.
+    type signatures of this class.
     """
 
+    @abstractmethod
     def get_cached_token(self):
         """
         Get and return a token_info dictionary object.
         """
-        # return token_info
-        raise NotImplementedError()
 
+    @abstractmethod
     def save_token_to_cache(self, token_info):
         """
         Save a token_info dictionary object to the cache and return None.
         """
-        raise NotImplementedError()
-        return None
 
 
 class CacheFileHandler(CacheHandler):

spotipy/oauth2.py

@@ -277,7 +277,11 @@ class SpotifyOAuth(SpotifyAuthBase):
              * client_secret: Must be supplied or set as environment variable
              * redirect_uri: Must be supplied or set as environment variable
              * state: Optional, no verification is performed
-             * scope: Optional, either a list of scopes or comma separated string of scopes.
+             * scope: Optional, either a string of scopes, or an iterable with elements of type
+                      `Scope` or `str`. E.g.,
+                      {Scope.user_modify_playback_state, Scope.user_library_read}
+
+             iterable of scopes or comma separated string of scopes.
                       e.g, "playlist-read-private,playlist-read-collaborative"
              * cache_path: (deprecated) Optional, will otherwise be generated
                            (takes precedence over `username`)
@@ -1011,8 +1015,9 @@ class SpotifyImplicitGrant(SpotifyAuthBase):
         * client_id: Must be supplied or set as environment variable
         * redirect_uri: Must be supplied or set as environment variable
         * state: May be supplied, no verification is performed
-        * scope: Optional, either a list of scopes or comma separated string of scopes.
+        * scope: Optional, either a string of scopes, or an iterable with elements of type
-                 e.g, "playlist-read-private,playlist-read-collaborative"
+                      `Scope` or `str`. E.g.,
+                      {Scope.user_modify_playback_state, Scope.user_library_read}
         * cache_handler: An instance of the `CacheHandler` class to handle
                               getting and saving cached authorization tokens.
                               May be supplied, will otherwise use `CacheFileHandler`.

spotipy/scope.py

@@ -0,0 +1,85 @@
+# -*- coding: utf-8 -*-
+
+__all__ = ["Scope"]
+
+from enum import Enum
+import re
+from typing import Iterable, Set
+
+
+class Scope(Enum):
+    """
+    The Spotify authorization scopes
+
+    Create a Scope from a string:
+
+    scope = Scope("playlist-modify-private")
+
+    Create a set of scopes:
+
+    scopes = {
+        Scope.user_read_currently_playing,
+        Scope.playlist_read_collaborative,
+        Scope.playlist_modify_public
+    }
+    """
+
+    user_read_currently_playing = "user-read-currently-playing"
+    playlist_read_collaborative = "playlist-read-collaborative"
+    playlist_modify_private = "playlist-modify-private"
+    user_read_playback_position = "user-read-playback-position"
+    user_library_modify = "user-library-modify"
+    user_top_read = "user-top-read"
+    user_read_playback_state = "user-read-playback-state"
+    user_read_email = "user-read-email"
+    ugc_image_upload = "ugc-image-upload"
+    user_read_private = "user-read-private"
+    playlist_modify_public = "playlist-modify-public"
+    user_library_read = "user-library-read"
+    streaming = "streaming"
+    user_read_recently_played = "user-read-recently-played"
+    user_follow_read = "user-follow-read"
+    user_follow_modify = "user-follow-modify"
+    app_remote_control = "app-remote-control"
+    playlist_read_private = "playlist-read-private"
+    user_modify_playback_state = "user-modify-playback-state"
+
+    @staticmethod
+    def all() -> Set['Scope']:
+        """Returns all of the authorization scopes"""
+
+        return set(Scope)
+
+    @staticmethod
+    def make_string(scopes: Iterable['Scope']) -> str:
+        """
+        Converts an iterable of scopes to a space-separated string.
+
+        * scopes: An iterable of scopes.
+
+        returns: a space-separated string of scopes
+        """
+        return " ".join([scope.value for scope in scopes])
+
+    @staticmethod
+    def from_string(scope_string: str) -> Set['Scope']:
+        """
+        Converts a string of (usuallly space-separated) scopes into a
+        set of scopes
+
+        Any scope-strings that do not match any of the known scopes are
+        ignored.
+
+        * scope_string: a string of scopes
+
+        returns: a set of scopes.
+        """
+        scope_string_list = re.split(pattern=r"[^\w-]+", string=scope_string)
+        scopes = set()
+        for scope_string in sorted(scope_string_list):
+            try:
+                scope = Scope(scope_string)
+                scopes.add(scope)
+            except ValueError:
+                pass
+        return scopes

tests/unit/test_scopes.py

@@ -0,0 +1,90 @@
+from unittest import TestCase
+from spotipy.scope import Scope
+from spotipy.oauth2 import SpotifyAuthBase
+
+
+class SpotipyScopeTest(TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        cls.auth_manager = SpotifyAuthBase(requests_session=True)
+
+    def normalize_scope(self, scope):
+        return self.auth_manager._normalize_scope(scope)
+
+    def test_empty_scope(self):
+        scopes = set()
+        scope_string = Scope.make_string(scopes)
+
+        normalized_scope_string = self.normalize_scope(scopes)
+        normalized_scope_string_2 = self.normalize_scope(scope_string)
+
+        self.assertEqual(scope_string, "")
+        self.assertEqual(normalized_scope_string, "")
+        self.assertEqual(normalized_scope_string_2, "")
+
+        converted_scopes = Scope.from_string(scope_string)
+        self.assertEqual(converted_scopes, set())
+
+    def test_scopes(self):
+        scopes = {
+            Scope.playlist_modify_public,
+            Scope.playlist_read_collaborative,
+            Scope.user_read_playback_state,
+            Scope.ugc_image_upload
+        }
+        normalized_scope_string = self.normalize_scope(scopes)
+        scope_string = Scope.make_string(scopes)
+        self.assertEqual(scope_string, normalized_scope_string)
+
+        normalized_scope_string_2 = self.normalize_scope(scope_string)
+
+        converted_scopes = Scope.from_string(scope_string)
+        normalized_converted_scope = Scope.from_string(normalized_scope_string)
+        normalized_converted_scope_2 = Scope.from_string(normalized_scope_string_2)
+        self.assertEqual(scopes, converted_scopes)
+        self.assertEqual(scopes, normalized_converted_scope)
+        self.assertEqual(scopes, normalized_converted_scope_2)
+
+    def test_single_scope(self):
+        scope_string = "user-modify-playback-state"
+        scope = Scope(scope_string)
+        self.assertEqual(scope, Scope.user_modify_playback_state)
+        self.assertEqual(scope_string, scope.value)
+
+    def test_scope_string(self):
+        scope_string = (
+            "user-read-currently-playing    playlist-read-collaborative,user-library-read "
+            "playlist-read-private user-read-email"
+        )
+        expected_scopes = {
+            Scope.user_read_currently_playing,
+            Scope.playlist_read_collaborative,
+            Scope.user_library_read,
+            Scope.playlist_read_private,
+            Scope.user_read_email
+        }
+        parsed_scopes = Scope.from_string(scope_string)
+        normalized_scope_string = self.normalize_scope(scope_string)
+        normalized_parsed_scopes = Scope.from_string(normalized_scope_string)
+        self.assertEqual(parsed_scopes, expected_scopes)
+        self.assertEqual(normalized_parsed_scopes, expected_scopes)
+
+    def test_invalid_types(self):
+
+        numbers = [1, 2, 3]
+        with self.assertRaises(TypeError):
+            self.normalize_scope(numbers)
+
+        with self.assertRaises(TypeError):
+            self.normalize_scope(True)
+
+    def test_normalize_scope(self):
+
+        normalized_scope_string = self.normalize_scope([])
+        self.assertEqual(normalized_scope_string, "")
+
+        normalized_scope_string_2 = self.normalize_scope(())
+        self.assertEqual(normalized_scope_string_2, "")
+
+        self.assertIsNone(self.normalize_scope(None))