Add comments.

api_app.py

@@ -67,12 +67,14 @@ def select_all_frames(conn):
 
 class Packets(Resource):
     def get(self):
+        # Handle arguments that may or may not exist
         try:
             n = int(request.args.get('n'))
         except:
             n = 10
-        print(n)
+
         conn = get_db_connection()
+        # Limit to number of records requested
         data = select_all_frames(conn)[-n:]
         # Sort by created date, descending (https://stackoverflow.com/a/45266808)
         data.sort(key=operator.itemgetter('created'), reverse=True)