Re-order imports and specify UTF-8 encoding header in all base modules and package initialiser (ref. https://www.python.org/dev/peps/pep-0008/#imports, https://www.python.org/dev/peps/pep-0008/#source-file-encoding) + add __all__ attribute

spotipy/__init__.py

@@ -1,2 +1,3 @@
 VERSION='2.0.1'
-from .client import Spotify, SpotifyException
+
+from .client import *

spotipy/client.py

@@ -1,16 +1,21 @@
-# coding: utf-8
+# -*- coding: utf-8 -*-
 
+""" A simple and thin Python library for the Spotify Web API """
 
 from __future__ import print_function
-import sys
-import requests
+
+__all__ = [
+    'Spotify',
+    'SpotifyException'
+]
+
 import json
+import sys
 import time
 
+import requests
 import six
 
-""" A simple and thin Python library for the Spotify Web API
-"""
 
 
 class SpotifyException(Exception):

spotipy/oauth2.py

@@ -1,11 +1,21 @@
+# -*- coding: utf-8 -*-
 
 from __future__ import print_function
+
+__all__ = [
+    'is_token_expired',
+    'SpotifyClientCredentials',
+    'SpotifyOAuth',
+    'SpotifyOauthError'
+]
+
 import base64
-import requests
-import os
 import json
-import time
+import os
 import sys
+import time
+
+import requests
 
 # Workaround to support both python 2 & 3
 import six

spotipy/util.py

@@ -1,9 +1,17 @@
+# -*- coding: utf-8 -*-
 
-# shows a user's playlists (need to be authenticated via oauth)
+""" Shows a user's playlists (need to be authenticated via oauth) """
 
 from __future__ import print_function
+
+__all__ = [
+    'prompt_for_user_token9'
+]
+
 import os
+
 from . import oauth2
+
 import spotipy
 
 def prompt_for_user_token(username, scope=None, client_id = None,