Stage 1 conversion to JSON for storing Credentials.

Reviewed in http://codereview.appspot.com/4972065/
diff --git a/samples/appengine_with_decorator2/main.py b/samples/appengine_with_decorator2/main.py
index 03963f4..4cd2401 100644
--- a/samples/appengine_with_decorator2/main.py
+++ b/samples/appengine_with_decorator2/main.py
@@ -43,8 +43,7 @@
 decorator = OAuth2Decorator(
     client_id='837647042410-75ifgipj95q4agpm0cs452mg7i2pn17c.apps.googleusercontent.com',
     client_secret='QhxYsjM__u4vy5N0DXUFRwwI',
-    scope='https://www.googleapis.com/auth/buzz',
-    user_agent='my-sample-app/1.0')
+    scope='https://www.googleapis.com/auth/buzz')
 
 http = httplib2.Http(memcache)
 service = build("buzz", "v1", http=http)
diff --git a/samples/buzz/buzz.py b/samples/buzz/buzz.py
index 2fb4e85..8906048 100644
--- a/samples/buzz/buzz.py
+++ b/samples/buzz/buzz.py
@@ -88,6 +88,7 @@
   # Credentials will get written back to a file.
   storage = Storage('buzz.dat')
   credentials = storage.get()
+
   if credentials is None or credentials.invalid:
     credentials = run(FLOW, storage)
 
@@ -112,31 +113,10 @@
       activitylist = activities.list_next(activitylist).execute()
       print "Retrieved the next two activities"
 
-    # Add a new activity
-    new_activity_body = {
-        'title': 'Testing insert',
-        'object': {
-          'content':
-          u'Just a short note to show that insert is working. ☄',
-          'type': 'note'}
-        }
-    activity = activities.insert(userId='@me', body=new_activity_body).execute()
-    print "Added a new activity"
-
-    activitylist = activities.list(
-        max_results='2', scope='@self', userId='@me').execute()
-
-    # Add a comment to that activity
-    comment_body = {
-        "content": "This is a comment"
-        }
-    item = activitylist['items'][0]
-    comment = service.comments().insert(
-        userId=item['actor']['id'], postId=item['id'], body=comment_body
-        ).execute()
-    print 'Added a comment to the new activity'
-    pprint.pprint(comment)
-
+    # List the number of followers
+    followers = service.people().list(
+        userId='@me', groupId='@followers').execute(http)
+    print 'Hello, you have %s followers!' % followers['totalResults']
 
   except AccessTokenRefreshError:
     print ("The credentials have been revoked or expired, please re-run"
diff --git a/samples/moderator/moderator.py b/samples/moderator/moderator.py
index b7da058..e92ef1b 100644
--- a/samples/moderator/moderator.py
+++ b/samples/moderator/moderator.py
@@ -140,8 +140,6 @@
                      body=vote_body)
     print "Voted on the submission"
 
-
-
   except AccessTokenRefreshError:
     print ("The credentials have been revoked or expired, please re-run"
       "the application to re-authorize")
diff --git a/samples/prediction/prediction.py b/samples/prediction/prediction.py
index 3ffa974..1227019 100644
--- a/samples/prediction/prediction.py
+++ b/samples/prediction/prediction.py
@@ -109,7 +109,7 @@
 
     # Start training on a data set
     train = service.training()
-    body = {'id' : FLAGS.object_name}
+    body = {'id': FLAGS.object_name}
     start = train.insert(body=body).execute()
 
     print 'Started training'
diff --git a/samples/src/moderator.py b/samples/src/moderator.py
index 1ab9ea8..e27b811 100644
--- a/samples/src/moderator.py
+++ b/samples/src/moderator.py
@@ -43,4 +43,3 @@
                    submissionId=submission['id']['submissionId'],
                    body=vote_body)
   print "Voted on the submission"
-