simple oauth flow for getting a spotify access token

added an example that requires oauth

examples/user_playlists.py

@@ -0,0 +1,34 @@
+# shows a user's playlists (need to be authenticated via oauth)
+
+import pprint
+import sys
+
+import spotipy
+import oauth2
+
+if len(sys.argv) > 1:
+    username = sys.argv[1]
+else:
+	print "Whoops, need your username!"
+	print "usage: python user_playlists.py [username]"
+    sys.exit()
+
+# Create these via developer.spotify.com/my-applications
+
+client_id = ''
+client_secret = ''
+redirect_uri = ''
+
+# Oauth flow
+sp_oauth = oauth2.SpotifyOAuth(client_id, client_secret, redirect_uri)
+auth_url = sp_oauth.get_authorize_url()
+print "Please navigate here: %s" % auth_url
+response = raw_input("The URL you were redirected to: ")
+code = sp_oauth.parse_response_code(response)
+access_token = sp_oauth.get_access_token(code)
+
+# Auth'ed API request
+
+sp = spotipy.Spotify(auth=access_token)
+playlists = sp.user_playlists(username)
+pprint.pprint(playlists)