Updated all samples to use 'service' as the object returned from build()
diff --git a/samples/oauth2/buzz/buzz.py b/samples/oauth2/buzz/buzz.py
index a009517..86ceaf9 100644
--- a/samples/oauth2/buzz/buzz.py
+++ b/samples/oauth2/buzz/buzz.py
@@ -41,9 +41,9 @@
   http = httplib2.Http()
   http = credentials.authorize(http)
 
-  p = build("buzz", "v1", http=http,
+  service = build("buzz", "v1", http=http,
             developerKey="AIzaSyDRRpR3GS1F1_jKNNM9HCNd2wJQyPG3oN0")
-  activities = p.activities()
+  activities = service.activities()
 
   # Retrieve the first two activities
   activitylist = activities.list(
@@ -78,7 +78,7 @@
           }
       }
   item = activitylist['items'][0]
-  comment = p.comments().insert(
+  comment = service.comments().insert(
       userId=item['actor']['id'], postId=item['id'], body=comment_body
       ).execute()
   print 'Added a comment to the new activity'